The British commentariat is trapped in a 1980s time warp. Every time the UK hits a growth slump, the standard corporate playbook gets dusted off: slash taxes, deregulate the planning system, clip the wings of regulators, and wait for the magic of supply-side economics to lift the country out of stagnation.
It is a comforting, lazy consensus. It is also entirely wrong.
The conventional narrative argues that Britain’s sluggish productivity and crumbling infrastructure stem from a choked supply side. The diagnosis says the state is too big, rules are too tight, and taxes are too high. Fix the supply incentives, the logic goes, and investment will flood back.
This is a fundamental misunderstanding of how modern economies operate. The UK does not have a supply problem that can be deregulated away. It has an institutionalized demand deficiency driven by chronic corporate underinvestment, a broken corporate governance framework, and a desperate lack of public co-investment. Pretending that another round of planning reforms or marginal tax cuts will cure a deep-seated structural disease is worse than wishful thinking; it is economic sabotage.
The Myth of the Over-Regulated British Wasteland
Let us dismantle the core premise of the traditional supply-side argument: that British business is suffocated by red tape.
When you look at actual international data rather than think-tank pamphlets, this claim falls apart. The OECD consistently ranks the UK as having some of the least restrictive product market regulations and among the most flexible labor markets in the developed world.
If ultra-flexible labor laws and a highly deregulated corporate environment were the silver bullets for growth, the UK should be a productivity powerhouse outpacing continental Europe. Instead, British productivity per hour worked lags behind France and Germany—countries with famously rigid labor laws and powerful trade unions—by significant double-digit margins.
The supply-siders miss the nuance entirely. Regulation is not a monolithic drag on growth. In many cases, a lack of clear, long-term regulatory frameworks is exactly what paralyzes investment.
Imagine a scenario where an energy firm wants to commit £5 billion to a new offshore wind array or a clean hydrogen plant. They do not need a wild-west environment devoid of rules. They need regulatory certainty that spans twenty years so they can price risk accurately. By constantly tearing up rules, flirting with sunsets on environmental standards, and promising "bonfires of regulations," governments create structural instability. Capital does not flow to chaos; it flees it.
Why Tax Cuts Are Failing to Trigger Investment
The second pillar of the lazy consensus is that Britain's corporate tax regime is stifling the animal spirits of entrepreneurs. The argument goes that if you lower the tax burden or offer hyper-generous capital allowances, companies will magically stop hoarding cash and start building factories.
I have spent years advising institutional investors and sitting in rooms where capital allocation decisions are actually made. Do you know how many times a FTSE 100 board has rejected a genuinely transformative, high-yield infrastructure project solely because the corporation tax rate was 25% instead of 19%? Zero.
Companies invest when they see growing markets, stable consumer demand, and a skilled workforce that can execute the vision. Tax rates are a secondary consideration, a optimization problem handled by accountants after the strategic decision to invest has already been made.
The UK has experimented with ultra-low corporate tax rates before. Throughout the 2010s, the headline corporation tax rate was slashed from 28% to 19%. If the supply-side model worked, this should have triggered an unprecedented boom in business investment.
It did not. Business investment as a share of UK GDP remained stuck at the bottom of the G7 leaderboard. Instead of funding research and development or upgrading outdated machinery, the windfall from lower taxes was largely funneled into share buybacks, dividend payouts, and cash reserves.
The data from the Office for National Statistics (ONS) is brutal on this point. The UK underinvests relative to its peers by roughly 4% of GDP every single year. That is an annual investment gap of tens of billions of pounds. Cutting taxes further does not fix this; it merely subsidizes the existing underinvestment.
The Real Disease: Shareholder Primacy and Short-Termism
To understand why the UK is in a rut, you have to look at the plumbing of British capitalism, not the tax code. The real culprit is a corporate governance culture obsessed with short-term shareholder value at the expense of long-term asset creation.
The British stock market has evolved into an income fund for retirees rather than an engine for growth. UK listed companies pay out a far higher proportion of their earnings in dividends than their American or European counterparts. When a British CEO decides to conserve cash to fund a risky, ten-year decarbonization project, institutional shareholders frequently revolt, demanding immediate payouts instead.
UK Corporate Capital Allocation Deficit:
[Earnings] ──> [High Dividend Payouts / Buybacks] ──> Low Retained Earnings ──> Stagnant R&D
This structural short-termism is compounded by a deep failure in the UK's financial architecture. The country's massive pension funds—holding trillions of pounds in assets—have systematically de-risked over the past two decades. Driven by regulatory changes like the introduction of Mark-to-Market accounting standards, they shifted away from UK equities and productive infrastructure into low-yielding government bonds.
In 2000, UK pension funds held about 39% of their assets in UK equities. Today, that figure is under 5%. The capital pool that should be funding the next generation of British industries has been hollowed out by risk aversion. No amount of planning deregulation will change the fact that the domestic financial system is structurally allergic to funding long-term industrial risk.
Dismantling the Public Investment Fallacy
When challenged on this investment drought, the knee-jerk reaction of the supply-side purist is to demand that the state step out of the way entirely. They argue that public investment "crowds out" private capital.
This view is dangerously obsolete. In a modern technological economy, public investment does not crowd out private capital; it crowds it in.
Look at how the United States transformed its industrial trajectory. The US did not achieve its current tech dominance or its recent manufacturing boom by simply slashing taxes and hoping for the best. It used massive, targeted public capital injections via the Inflation Reduction Act (IRA) and the CHIPS Act. The state took the first-loss risk, funded the foundational research, and built the underlying infrastructure.
The private sector responded by pouring hundreds of billions of dollars alongside those public funds.
The UK has done the exact opposite. Every time a fiscal squeeze hits, the Treasury slashes the public capital investment budget because it is politically easier than cutting current spending on public services. The result? Crumbling transport networks, an energy grid that takes a decade to connect new power sources, and a healthcare system crippled by a lack of diagnostic machinery.
If the state refuses to fund the foundational platforms of an economy—the roads, the clean energy grids, the high-speed data networks, the laboratory spaces—private capital will simply go elsewhere. A biotech startup will move to Boston; a green steel manufacturer will set up shop in Germany. They are not fleeing British taxes; they are fleeing British obsolescence.
Addressing the Wrong Questions
The public debate around UK growth is fundamentally warped because politicians and analysts are answering flawed questions.
- Flawed Question: "How do we cut red tape to make Britain more competitive?"
- The Brutal Reality: The UK is already highly deregulated. The obstacle isn't the presence of regulations, but the erratic, unpredictable nature of policy shifts that prevents businesses from planning beyond the next political quarter.
- Flawed Question: "How can we lower taxes to incentivize work and investment?"
- The Brutal Reality: The UK’s tax-to-GDP ratio is historically high for the UK, but still lower than the EU average. The problem isn't the volume of tax collected; it’s the design of the tax system, which penalizes capital investment while favoring property speculation and unproductive wealth accumulation.
Consider the UK housing and planning crisis. The standard supply-side view is that the 1947 Town and Country Planning Act is the root of all economic evil. They claim that abolishing local planning powers will unleash a housebuilding boom that solves the productivity crisis.
This ignores the structural realities of the housebuilding industry. Major developers operate on a business model designed to maximize land values and profit margins, not volume. They drip-feed housing supply onto the market to keep prices high—a practice thoroughly documented in the government's own Oliver Review.
Simply deregulating planning without addressing land banking, the lack of a state-backed housebuilding engine, and the financialization of residential property will only lead to a speculative frenzy in land options, not the affordable urban density that productive economies actually require.
The Risk of the New Industrial Realism
Admitting that supply-side economics has failed does not mean embracing a consequence-free alternative. The counter-strategy—a proactive, state-led industrial strategy—comes with severe risks that proponents rarely admit.
If the state is going to co-invest and direct capital toward strategic sectors, it must be ruthless. Governments are notoriously bad at picking winners, but losers are incredibly good at picking governments. The risk of political capture, where dying industries are subsidized under the guise of "strategic independence," is immense.
To execute this correctly, the UK would need to completely overhaul the Treasury's green book appraisal system, which uses flawed cost-benefit analyses that systematically disadvantage regions outside London. It would require building a civil service with deep commercial expertise, capable of negotiating eye-to-eye with private equity and multinational corporations. Currently, that capability does not exist in Whitehall.
But choosing to avoid this structural overhaul because it is difficult, and instead falling back on the comfortable fiction of supply-side deregulation, is a recipe for managed decline.
The UK cannot compete globally as a low-tax, low-wage, deregulated offshore tax haven. It is too large for that model to sustain its population, and its public services are already near collapse from underfunding. It must compete on capital intensity, high productivity, world-class infrastructure, and specialized skills.
Stop looking for salvation in the tax code. Stop treating regulation as the scapegoat for corporate timidity. The market will not fix Britain’s investment crisis on its own. The state must step up, anchor the risk, build the foundations, and force British capitalism to grow up and invest in its own future.
