Direct, indirect, progressive and regressive

• Direct taxes — levied on income and wealth and paid straight to HMRC: income tax, National Insurance, corporation tax, capital gains tax, inheritance tax. The burden cannot be passed on.
• Indirect taxes — levied on spending, collected by the seller: VAT, fuel duty, alcohol and tobacco duties. The burden can be shifted onto the consumer, depending on elasticities (4.1.8).

Classify a tax by what happens to the AVERAGE tax rate as income rises:

• Progressive — the average rate rises with income (UK income tax: 0% personal allowance, then 20%, 40%, 45%). It reduces inequality.
• Proportional — a constant average rate (a flat tax).
• Regressive — the average rate falls as income rises. VAT and duties are regressive in effect: the poor spend a far larger share of their income, so a flat 20% VAT takes a bigger bite out of it. It widens inequality.

Adam Smith's canons of taxation: equitable, certain, convenient and economical to collect — to which economists add that taxes should be efficient (minimise distortions to behaviour) and flexible.

Your turn — the average tax rate

The economic effects of taxation

Any tax change works through four channels, and AQA wants all of them:

• Incentives — income tax cuts raise the reward for an extra hour's work (the substitution effect favours more work). But the income effect can push the other way: a tax cut lets you reach your target income with fewer hours. Which dominates is an empirical question, and the honest answer is that the effect is modest for most people.
• Output and employment (AD) — a tax cut raises disposable income → C rises → AD rises. Corporation tax cuts raise post-tax profit → I may rise.
• Inflation — a rise in indirect taxes (VAT, duties) raises costs and prices directly: SRAS shifts left. It is a one-off increase in the price level, though it can trigger second-round effects.
• The distribution of income — progressive direct taxes narrow the gap; indirect taxes are regressive and widen it. The overall incidence of the tax system is what matters, not any single tax.

Also on the spec: the effects on the trade balance (higher taxes cut incomes and therefore imports) and on FDI (a low corporation tax attracts multinationals — which is why corporation tax competition between countries has driven rates down worldwide, a race to the bottom).

Government spending, stabilisers and discretionary policy

Types of government spending: current (day-to-day: NHS salaries, school running costs), capital (investment in infrastructure — this raises LRAS as well as AD), and transfer payments (benefits and pensions — not part of G in the AD equation, because no output is bought; they redistribute income which then shows up in C).

Fiscal policy uses G and T to influence AD.

• Expansionary — raise G and/or cut T → AD rises. Used to close a negative output gap.
• Contractionary — cut G and/or raise T → AD falls. Used to control demand-pull inflation or to reduce a deficit.

Automatic stabilisers — the parts of the budget that move against the cycle without any decision being taken. In a recession, incomes fall so tax revenue falls automatically, while unemployment rises so benefit spending rises automatically. Both cushion the fall in AD. In a boom the reverse happens, restraining the boom. A progressive tax system and a generous welfare state make stabilisers stronger.

Discretionary policy is a deliberate change — a Budget decision to cut VAT or launch an infrastructure programme.

Evaluate fiscal policy: it is powerful (a direct injection with a multiplier) and it can be targeted at particular regions or groups, and capital spending raises LRAS as well as AD. But: time lags (recognition, decision, implementation — an infrastructure project takes years); it worsens the deficit; possible crowding out; and the size of the multiplier is uncertain and small in a very open economy.

Your turn — a fiscal stimulus and the multiplier

The budget deficit and the national debt

• Budget deficit — a FLOW: government spending exceeds tax revenue in a given year. (A surplus is the opposite.)
• National debt — a STOCK: the total accumulated borrowing from every past deficit. A deficit adds to the debt. So the debt can keep rising even while the deficit is falling — a distinction politicians blur constantly and examiners test relentlessly.

Cyclical vs structural:

• The cyclical deficit is the part caused by the economic cycle — it appears automatically in a recession (via the stabilisers) and disappears on its own in the recovery.
• The structural deficit is the part that would remain even at full employment. This is the part that requires real decisions — higher taxes or lower spending — and it is the one that matters for sustainability.

Why a large debt matters: interest payments have a huge opportunity cost (money that could fund schools); higher borrowing may push up interest rates and crowd out private investment; it burdens future generations; a loss of market confidence can trigger a bond sell-off, downgrade and spiralling borrowing costs.

Why it may not matter as much as feared: what counts is debt as a % of GDP, and growth can shrink that ratio without repaying a penny; borrowing to fund capital investment raises LRAS and future tax revenue, so it can pay for itself; in a recession there is no crowding out because the resources are idle (there may even be crowding IN); and a country that borrows in its own currency (the UK) cannot be forced to default.

Your turn — the debt-to-GDP ratio

Automatic or discretionary?

The size and composition of government spending

UK government spending is roughly 40–45% of GDP. Its composition matters as much as its size.

• Current spending — day-to-day: NHS staff, teachers, defence running costs. Supports AD and public services, but does little for LRAS.
• Capital spending — infrastructure, hospitals, schools, R&D. Raises AD now and LRAS later. It is the most economically valuable spending — and it is always the first thing cut in an austerity programme, because nobody notices a road that was never built.
• Transfer payments — pensions (the largest single item), Universal Credit, disability benefits. Not part of G in AD, but they redistribute income to households with a high MPC, so they feed straight into C.
• Debt interest — pure opportunity cost, and it rises sharply with interest rates and the size of the debt.

Arguments for a larger state: it provides public goods, corrects market failure, redistributes income, and invests in human and physical capital.
Arguments for a smaller state: crowding out, high taxes distort incentives, government failure and X-inefficiency, and the risk that public sector borrowing is unsustainable.

Demographics is the elephant in the room: an ageing population means rising pension, NHS and social care costs falling on a shrinking working-age tax base. That is the source of the UK's long-run structural deficit, and it cannot be fixed by growth alone.

Cyclical or structural?

Tax rates, incentives and revenue

The Laffer curve plots tax revenue against the tax rate.

• At 0%, revenue is obviously zero.
• At 100%, nobody would work (or everyone would evade), so revenue is zero again.
• So revenue rises, peaks at some rate T*, then falls. Beyond T*, cutting the tax rate would actually raise revenue — because it improves incentives to work, sharpens entrepreneurship, and reduces avoidance, evasion and emigration.

Evaluate it properly. The logic of the Laffer curve is undeniable. What is fiercely contested is where T* actually is. If the current rate is below T*, a tax cut simply loses revenue — as most estimates of the UK's 45% additional rate suggest. And the income effect can offset the substitution effect: some people respond to a tax cut by working less, since they can hit their target income with fewer hours. The curve is a real constraint, not a licence for any tax cut you fancy.

Market-based vs interventionist supply-side policies

Supply-side policies aim to shift LRAS to the right — raising the economy's productive capacity and its productivity. The prize is enormous: output rises and the price level falls, so growth, inflation, unemployment and the current account all improve together, with no trade-off.

Market-based (free-market) policies — reduce government interference and let markets work:

• Cutting income tax and corporation tax to sharpen incentives to work, save and invest (the Laffer argument).
• Reforming benefits to make work pay (tackling the unemployment trap).
• Deregulation and privatisation — competition and the profit motive drive out X-inefficiency.
• Labour market flexibility — reducing union power, easing hiring and firing.
• Free trade and open markets.

Interventionist policies — the state fixes what the market under-provides (because of positive externalities):

• Education and training — raises human capital and the MRP of labour, and tackles structural unemployment. Slow, but the highest long-run payoff.
• Infrastructure — roads, rail, ports, broadband, energy. Cuts firms' costs.
• Subsidies for R&D and innovation; industrial strategy; regional policy.
• Improving occupational and geographical mobility (housing, transport).

Evaluate: supply-side policy is the only route to sustainable non-inflationary growth — but it is slow (education takes a generation), has a large opportunity cost, and success is uncertain. Market-based policies can widen inequality (tax cuts help the rich, weaker unions and less job security hurt workers) and risk government failure if the state picks the wrong winners. And crucially: in a deep recession, supply-side policy is not enough — you cannot fix a demand-deficient economy by expanding capacity that nobody wants to buy from. The right answer usually combines demand-side and supply-side tools.

Market-based, interventionist or demand-side?

Tap a policy, then tap the category it belongs to.

Match the fiscal term

Tap a description on the left, then the term it defines.

The supply-side prize

Crowding out

Fiscal policy: the trade-offs in practice

Every fiscal decision runs into the objectives from 4.2.3.

• Stimulus vs the deficit — the expansion that ends a recession also widens the deficit. But note the two-way street: austerity that cuts AD can shrink GDP so much (via the multiplier) that the debt-to-GDP ratio actually RISES. That was the central charge against post-2010 UK austerity, and it is why the size of the multiplier was suddenly the most politically charged number in economics.
• Stimulus vs inflation — near full capacity a fiscal expansion is largely inflationary (a vertical LRAS).
• Stimulus vs the current account — higher incomes suck in imports, worsening the current account deficit.
• Tax cuts vs equality — cuts to top rates and to corporation tax tend to widen inequality; cuts to VAT or rises in the personal allowance are more progressive.
• Credibility — a government perceived to be borrowing recklessly can face a bond market revolt: yields spike, borrowing costs rise, and the stimulus is self-defeating. Hence fiscal rules and the independent Office for Budget Responsibility.

The framing that scores: the right fiscal stance depends on where the economy is in the cycle, whether the deficit is cyclical or structural, whether spending is current or capital, and the size of the multiplier. State those four conditions and you have written the evaluation before you have written the conclusion.

The big ideas to know

You have covered the whole of AQA 4.2.5. Press Finish to see your score.