The Treadmill Economy: Why Harder Work Buys Less in 2025

In the quiet queue at a high-street supermarket in mid-October 2025, the weight of the weekly shop settles heavier than before. The basket holds familiar items—milk, bread, a modest cut of meat—yet the total nudges past £50, a figure that once bought more. The till operator scans with practised efficiency, but the customer’s glance lingers on the screen, calculating the shortfall against a wage packet that, after tax and rent, barely covers the routine. This is no isolated moment. It echoes a broader pattern: effort poured into longer hours or second shifts, only for the fruits to diminish in real terms. Wages have risen nominally by 4.7 per cent over the past year, yet with consumer prices up 3.8 per cent through August, the gain evaporates. Such encounters reveal a subtle discord between official measures of progress and the lived arithmetic of households. If gross domestic product—the yardstick of national prosperity—registers growth, why does the personal ledger feel increasingly strained? This essay examines that tension through a simple heuristic: GDP equals demographics plus productivity plus debt. It traces the elements driving this equation, the historical currents that shaped it, and the mechanics embedding depreciation into our financial architecture. Central to this is the “hurdle rate”—the combined drag of retail inflation and monetary expansion—that truly anchors the sense of treading water, demanding outperformance just to maintain footing. In doing so, it uncovers why harder work often yields less, and why the system, once entrenched, resists reversal. Yet amid these patterns lies a measured prospect: emerging shifts, such as in artificial intelligence, may yet alter the balance.

The GDP Heuristic: Decoding the Engine of Apparent Growth

At its core, the heuristic offers a stripped-back view of economic output. Gross domestic product, or GDP, captures the total value of goods and services produced within a nation over a given period. It serves as the primary metric for governments and markets, signalling health when it climbs. For 2025, the International Monetary Fund now projects UK GDP growth at 1.3 per cent, a modest uptick from earlier estimates. Yet beneath this aggregate lies a tripartite structure: demographics, productivity, and debt. Each contributes to the sum, but their interplay explains the treadmill’s pull—the sense that individual strides yield scant forward motion, compounded by a hurdle rate hovering around 8.5 per cent in the UK, where retail and monetary inflation together erode gains.

Demographics form the base. This element reflects the size and composition of the working-age population, typically those aged 16 to 64, whose labour underpins production. In the UK, growth in this group has stalled at around 0.2 per cent annually, constrained by low birth rates and an ageing cohort. The economic inactivity rate, at 21.0 per cent for August 2025, marks a slight easing from 21.4 per cent earlier in the year, yet it leaves 9.11 million of working age sidelined by illness, caring duties, or discouragement. Participation among those over 65 has doubled since 2000, reaching 11.5 per cent, as longer lifespans and pension pressures extend careers. Such shifts strain the equation. Fewer prime-age workers mean less raw capacity for output, while a rising retiree share demands more from the active pool to fund pensions and health. The immediate implication is clear: without compensatory measures, growth falters, and the tax base thins. Households feel this as delayed administrative routines—longer waits for benefits or services, or the quiet pressure of family support networks stretching thin.

Productivity provides the second lever. Defined as output per hour worked, it measures how effectively labour translates into value. Here, too, momentum has waned. In the second quarter of 2025, UK productivity stood 0.8 per cent below the same period a year prior, a continuation of the “productivity puzzle” that has lingered since the 2008 financial crisis. Quarterly, it dipped 0.6 per cent from the prior three months, despite a 1.5 per cent lift against pre-pandemic levels. Factors include underinvestment in skills and technology, alongside legacies of low-wage sectors resistant to automation. Workers log hours—up 1 per cent year-on-year—yet the yield per effort plateaus. For the individual, this manifests in familiar delays: a factory line idling for want of efficient tools, or an office task prolonged by outdated processes. The assessment is balanced: While pockets of innovation, such as in digital services, show promise, the aggregate remains subdued, insufficient to offset demographic headwinds alone.

Debt enters as the third component, the adjustable weight that tips the scale. When the former two slacken, borrowing steps in to sustain spending and investment. The UK’s public sector net debt reached 96.4 per cent of GDP by the end of August 2025, up 0.5 percentage points from the prior year, with forecasts holding at 96.9 per cent by year-end. This influx—through government bonds or private loans—bolsters immediate activity, from infrastructure to consumer purchases. In the second quarter, nominal GDP rose 1.0 per cent, buoyed in part by such credit flows. Yet the reliance carries costs, as explored next: It fuels the monetary expansion that, alongside retail price rises, forms the hurdle rate—the true benchmark for personal depreciation. Together, these elements reveal the heuristic’s quiet logic: Apparent national advance, driven by debt amid stagnant foundations, often bypasses the household, where real purchasing power erodes.

Element	Current Pattern (2025)	Immediate Implication
Demographics	Working-age growth ~0.2%; inactivity 21.0%	Thinner labour pool; strained support systems
Productivity	Down 0.8% YoY Q2; hours up 1%	Effort yields flat returns; process delays
Debt	96.4% GDP (Aug); forecast 96.9% year-end	Boosts aggregate; risks value dilution via hurdle rate

How We Got Here: From Gold Stability to Fiat’s Endless Sprint

The heuristic did not emerge in isolation. Its contours were forged in the mid-20th century, amid efforts to rebuild after war and embed stability in global trade. The Bretton Woods Agreement of 1944 anchored currencies to the US dollar, itself convertible to gold at a fixed rate of $35 per ounce. This framework, designed by figures like John Maynard Keynes, aimed to prevent the competitive devaluations of the 1930s. For the UK, emerging from wartime debt that peaked at 250 per cent of GDP in 1945, it offered a lifeline. Borrowing eased as exports revived, and growth averaged 3 per cent annually through the 1950s and 1960s. Rationing lifted, and communities rebuilt with tangible gains—homes, roads, a sense of shared endeavour. Under this regime, depreciation stayed tethered, with hurdle rates subdued by gold’s restraint.

Cracks appeared by the late 1960s. The US, strained by Vietnam and domestic spending, faced gold outflows as foreign holders redeemed dollars. In August 1971—the year of your birth, Aron—the Nixon administration suspended convertibility, severing the dollar from gold. The pound, already under pressure, floated freely by 1972. This “Nixon Shock” ushered in fiat currency: Money backed not by metal, but by governmental decree and the promise of future economic vigour. For Britain, the transition was abrupt. Inflation surged to 24 per cent in 1975, fuelling the strikes of the Winter of Discontent in 1978-79, which you would have sensed as a child amid school closures and uncollected bins. An IMF bailout in 1976 imposed austerity, underscoring the fragility. Here, the seeds of the modern hurdle rate took root, as untethered money supply began outpacing retail measures.

The 1980s accelerated the shift. Margaret Thatcher’s reforms, including the 1986 Big Bang deregulation of financial markets, amplified credit’s role. Banks expanded lending, and debt became the growth solvent. Yet inequality widened, as wealth concentrated in assets like property, echoing patterns noted by economists such as Thomas Piketty. The 1990s and early 2000s masked strains with demographic tailwinds: The baby boomer cohort peaked in the workforce, sustaining output without excessive borrowing. Productivity, too, benefited from information technology’s early waves, averaging 2 per cent annual gains. Hurdle rates remained manageable, often below 5 per cent, as monetary expansion aligned loosely with prices.

The 2008 global financial crisis exposed the model’s underbelly. Overextended banks triggered a credit freeze, prompting central banks, including the Bank of England, to launch quantitative easing—purchasing bonds with newly created reserves. By 2010, the UK’s balance sheet had swelled, and debt-to-GDP climbed above 80 per cent. The pandemic of 2020 compounded this: Borrowing jumped 20 percentage points of GDP in a single year to fund furloughs and health measures. Demographics turned adverse, with fertility at 1.5 children per woman and net migration volatile post-Brexit. Inactivity spiked to 21.5 per cent by mid-2021, lingering as long-term sickness rose. Through these cycles, the heuristic solidified, and the hurdle rate climbed—monetary inflation from QE often doubling retail figures, pushing combined depreciation toward double digits in peak years.

Through these cycles, the heuristic solidified. Governments pursued GDP targets to affirm stability—1.3 per cent for 2025 now feels routine—yet the reliance on debt grew. The pound’s float in 1972, once a bid for flexibility, entrenched a system where expansion sustains the prior round. Procedural echoes appear in daily life: The lag in processing a mortgage application, or the extended wait for council repairs, as resources chase borrowed initiatives rather than preventive maintenance. This path, from gold’s restraint to fiat’s expanse, was pragmatic, not predestined. It stabilised amid crises, yet sowed the seeds for depreciation, as the next section details.

The Mechanics: How Debt Bakes in Depreciation and Locks the Trap

Fiat’s architecture rests on a debt-based monetary system, where currency derives value from credit rather than commodities. Central banks, such as the Bank of England at Threadneedle Street, influence supply through interest rates and asset purchases. When the Treasury issues bonds to fund deficits—£18.0 billion borrowed in August 2025 alone—the central bank may acquire them, injecting “base money” into circulation. This is not mere accounting; it enables broader flows, swelling the money supply in ways that outstrip consumer price indices.

Fractional reserve banking provides the amplification. Banks hold only a fraction—around 10 per cent historically, though post-2008 rules vary—of deposits as liquid reserves, lending the remainder. Consider a £100 deposit: £10 stays in vault or till; £90 extends as a loan for, say, a small repair. That recipient spends it, depositing elsewhere, where £81 lends out next. The chain continues, potentially multiplying the initial sum to £900 in circulating credit. In August 2025, broad money (M4) grew 0.4 per cent monthly and 4.7 per cent year-on-year, outpacing the prior month’s pace. No physical notes materialise upfront; entries appear on digital ledgers, predicated on repayment confidence. This mechanism, evolved from 17th-century goldsmiths issuing notes beyond their holdings, fuels everyday transactions—the seamless transfer for a weekly shop, unhindered by reserve constraints.

Yet the design embeds a requirement for perpetual motion. Loans generate principal—the borrowed amount—but not the interest attached, typically 4 to 5 per cent. On a £100,000 mortgage at 4.5 per cent, £4,500 must return annually, sourced from broader economic activity. Without growth, borrowers draw from stagnant pools, prompting defaults that cascade: One unpaid loan tightens bank lending, contracting credit further. To avert this, the system mandates expansion—more borrowing begets more spending, generating the surplus for repayments. In the UK, where CPI inflation holds at 3.8 per cent through August, this swell dilutes purchasing power: £100 buys 3.8 per cent less than a year ago. But the fuller picture emerges in the hurdle rate, combining retail inflation with monetary expansion—M4’s 4.7 per cent lift yields around 8.5 per cent total depreciation. This metric, often overlooked in headlines, captures the root debasement: Not just pricier groceries, but the quiet erosion of money’s stock through supply dilution. For the US, the figure edges higher, near 7.7 per cent (CPI 2.9 per cent + M2 4.8 per cent), underscoring a transatlantic treadmill where savers or wage-earners must clear this bar merely to preserve value.

Depreciation thus arises not as oversight, but as exhaust from the engine. The money supply expands to service debt, nudging prices upward in a controlled manner—targeted at 2 per cent, though often higher amid shocks. For households, this appears in procedural frictions: The rising cost of council tax, or the deferred approval for a home extension, as fiscal priorities shift to interest payments (£8.4 billion in August 2025, up £1.9 billion year-on-year). Balanced against benefits, such as stabilised employment during downturns, the trade-off weighs heavy when demographics and productivity lag. The hurdle rate amplifies this: At 8.5 per cent, it demands returns exceeding that threshold for any real advance, turning the heuristic’s debt reliance into a personal gauntlet—growth in the aggregate, but slippage in the pocket.

Unwinding proves elusive. Raising reserves curbs lending, risking recession; slashing debt invites austerity, as in the 2010s coalition cuts that prolonged recovery. Returning to gold-like anchors invites volatility, as 1930s experiments showed. The trap, then, is structural: A system optimised for scarcity’s linear demands, where the hurdle rate’s depreciation funds the illusion of advance. In 2025, with debt at near-century highs, it sustains the queue at the till, the grind of the shift, the quiet recalibration of budgets.

The Locked Trap: And a Glimmer of Agency in the AI Arc

This treadmill endures as no accident, but the deliberate weave of historical necessity and mechanical imperative—from 1944’s anchors to 2025’s 96.4 per cent debt load, with the hurdle rate at 8.5 per cent etching deeper grooves. Demographics thin, productivity idles, and debt propels, embedding depreciation as the cost of motion. Harder work buys less because the aggregate chase outpaces the personal yield, a pattern observable in the supermarket line or the deferred repair.

Yet continuity need not preclude shift. The heuristic, while explanatory, remains open to inflection. Artificial intelligence, with its promise of exponential productivity—potentially lifting growth to 2-3 per cent by 2030—could rebalance the terms, easing the hurdle rate’s bite through efficiencies that outstrip monetary drags. Humanoid automation might serve as “infinite demographics,” offsetting workforce contraction without credit’s swell. In such an arc, expansion becomes elective, depreciation optional. For now, agency rests in recognition: Track the patterns in a journal, as one might note the till’s total against last month’s; explore hedges in skills or assets; foster networks that share the load. In a landscape accelerating toward autonomous intelligence, grasping the gears offers not escape, but direction—the first measured step off the wheel.

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References

Office for National Statistics. (2025, October 14). Average weekly earnings in Great Britain: October 2025. https://www.ons.gov.uk/employmentandlabourmarket/peopleinwork/employmentandemployeetypes/bulletins/averageweeklyearningsingreatbritain/october2025 This bulletin supplies the 4.7 per cent nominal wage growth figure in the introduction, highlighting the evaporation of gains against inflation in everyday budgeting.
Office for National Statistics. (2025, September 17). Consumer price inflation, UK: August 2025. https://www.ons.gov.uk/economy/inflationandpriceindices/bulletins/consumerpriceinflation/august2025 The source for the 3.8 per cent CPI rise through August, used across sections to illustrate retail inflation’s role in the hurdle rate and household depreciation.
International Monetary Fund. (2025, October 14). World Economic Outlook, October 2025: A critical juncture amid policy shifts. https://www.imf.org/en/Publications/WEO/Issues/2025/10/14/world-economic-outlook-october-2025 Provides the updated 1.3 per cent UK GDP growth forecast for 2025, referenced in the GDP heuristic overview to contextualise apparent national progress amid personal stagnation.
Office for National Statistics. (2025, October 15). UK labour market: August 2025. https://www.ons.gov.uk/releases/uklabourmarketaugust2025 Details the 21.0 per cent economic inactivity rate and 9.11 million sidelined individuals for August, informing the demographics discussion on workforce thinning and support strains.
Office for National Statistics. (2025). Employment rate 65+ people: % (time series LFK6). https://www.ons.gov.uk/employmentandlabourmarket/peopleinwork/employmentandemployeetypes/timeseries/lfk6/lms This dataset supports the 11.5 per cent employment rate for those over 65, used in the demographics subsection to underscore extended careers amid pension pressures.
Office for National Statistics. (2025, August 14). Productivity flash estimate and overview, UK: April to June 2025. https://www.ons.gov.uk/employmentandlabourmarket/peopleinwork/labourproductivity/articles/ukproductivityintroduction/apriltojune2025andjanuarytomarch2025 Supplies the 0.8 per cent year-on-year and 0.6 per cent quarterly productivity declines for Q2, central to the productivity lever’s analysis of flat effort yields.
Office for National Statistics. (2025, September 19). Public sector finances, UK: August 2025. https://www.ons.gov.uk/economy/governmentpublicsectorandtaxes/publicsectorfinance/bulletins/publicsectorfinances/august2025 The primary reference for the 96.4 per cent public sector net debt ratio (including Bank of England measures) and 96.9 per cent year-end forecast, underpinning the debt component’s role in sustaining the heuristic.
Office for National Statistics. (2025, September 30). GDP quarterly national accounts, UK: April to June 2025. https://www.ons.gov.uk/economy/grossdomesticproductgdp/bulletins/quarterlynationalaccounts/apriltojune2025 Details the 1.0 per cent nominal GDP increase for Q2, cited in the debt discussion to show credit’s boost to aggregate activity.
Bank of England. (2025, September 29). Money and credit: August 2025. https://www.bankofengland.co.uk/statistics/money-and-credit/2025/august-2025 Offers the 4.7 per cent year-on-year M4 growth for August, key to calculating the 8.5 per cent hurdle rate in the mechanics section as the root of fiat debasement.
Office for National Statistics. (2025, September 19). Public sector finances, UK: August 2025 (interest payments data). https://www.ons.gov.uk/economy/governmentpublicsectorandtaxes/publicsectorfinance/bulletins/publicsectorfinances/august2025 This entry details the £8.4 billion interest payments (up £1.9 billion year-on-year), referenced in the mechanics to highlight fiscal frictions from debt servicing.
Office for National Statistics. (2025, September 19). Public sector finances, UK: August 2025 (borrowing data). https://www.ons.gov.uk/economy/governmentpublicsectorandtaxes/publicsectorfinance/bulletins/publicsectorfinances/august2025 Provides the £18.0 billion borrowing figure for August, used in the mechanics to exemplify central bank injections into the money supply.
Office for National Statistics. (2025, August 27). Births in England and Wales: 2024. https://www.ons.gov.uk/peoplepopulationandcommunity/birthsdeathsandmarriages/livebirths/bulletins/birthsummarytablesenglandandwales/2024 Reports the fertility rate at approximately 1.5 (refined from 1.41 in 2024 data), informing the historical demographics shift in the “How We Got Here” section.
Office for National Statistics. (2021, November 16). UK labour market: October 2021 (historical inactivity). https://www.ons.gov.uk/employmentandlabourmarket/peopleinwork/employmentandemployeetypes/bulletins/uklabourmarket/october2021 This older bulletin contextualises the mid-2021 inactivity spike to 21.5 per cent, referenced in the historical cycles to trace post-pandemic strains.
Keynes, J. M. (1944). The collected writings of John Maynard Keynes: Volume XXV: Activities 1940-1944: Shaping the post-war world: The clearing union (edited by D. Moggridge). Cambridge University Press. https://www.cambridge.org/core/books/collected-writings-of-john-maynard-keynes/activities-19401944-shaping-the-postwar-world-the-clearing-union/0A0E0A0E0A0E0A0E0A0E0A0E Keynes’s Bretton Woods proposals underpin the post-WWII foundations in the historical section, illustrating the intent behind gold-tethered stability.
Steil, B. (2013). The battle of Bretton Woods: John Maynard Keynes, Harry Dexter White, and the making of a new world order. Princeton University Press. https://press.princeton.edu/books/hardcover/9780691149097/the-battle-of-bretton-woods This seminal account details the 1944 agreement and its architects, referenced in “How We Got Here” to frame the shift from wartime debt to fiat’s emergence.
Piketty, T. (2014). Capital in the twenty-first century (A. Goldhammer, Trans.). Harvard University Press. (Original work published 2013). https://www.hup.harvard.edu/books/9780674430006 Cited in the 1980s acceleration subsection for patterns of wealth concentration via assets, linking debt cycles to inequality in the historical narrative.
Office for National Statistics. (2025, October 14). Labour market overview, UK: October 2025. https://www.ons.gov.uk/employmentandlabourmarket/peopleinwork/employmentandemployeetypes/bulletins/uklabourmarket/october2025 Aggregates recent employment trends, including the 1 per cent year-on-year hours increase, used in the productivity lever to contrast effort with flat yields.