Lesson preview · Fiscal Policy Basics
Fiscal Policy Basics
~12 min · Free to read
In early 2009 the United States was bleeding 700,000 jobs a month. Congress passed an 800-billion-dollar package: money for roads and schools, cheques for households, tax breaks for firms. The bet was simple. If private spending had collapsed, the government would spend in its place and prop up demand.
That bet is fiscal policy — the government using its budget to steer the economy. You already know the economy can drift below or above potential output (the amount it makes at full employment). Fiscal policy is the government’s attempt to push it back. The job now is to see exactly which buttons it presses, and how each one moves aggregate demand.
Key Term
Fiscal policy — the two tools
Fiscal policy is the government’s use of spending and taxation to change total demand in the economy. It has two levers:
- Government spending (G) — what the state buys directly: roads, hospitals, defence, public salaries. More G is more spending in the economy.
- Taxes (T) — what the state takes from households and firms. Lower taxes leave people with more money to spend, so spending rises. Higher taxes do the reverse.
Both tools work on aggregate demand (AD) — the total planned spending on the country’s output. G is one of AD’s four components directly. T works through the others, by changing how much households and firms have left to spend.
Key Term
Expansionary vs contractionary
Fiscal policy comes in two stances, named by what they do to demand:
- Expansionary fiscal policy boosts demand: the government raises G, cuts T, or both. It treats a recessionary gap — output below potential, with high unemployment. More demand pushes the economy back up.
- Contractionary fiscal policy cools demand: the government cuts G, raises T, or both. It treats an inflationary gap — output above potential, with prices being bid up. Less demand cools the economy down.
Match the medicine to the illness: expansionary for a slump, contractionary for a boom.
Key Term
How fiscal policy shifts AD
Each stance shifts the whole aggregate demand curve, because it changes spending at every price level — not because the price level moved.
- Expansionary policy means more spending at every price level. AD shifts right. The crossing with short-run aggregate supply (SRAS) slides up the SRAS line: output rises and the price level rises a little.
- Contractionary policy means less spending at every price level. AD shifts left. Output falls and the price level eases.
This is the same logic as any AD shifter. A change in G or T for a policy reason — not a price-level change — moves the entire curve.
That is the takeaway: fiscal policy works by sliding the AD curve sideways — right to lift a slump, left to cool a boom — until output is back at potential.
Key Term
Automatic stabilizers — the budget that moves on its own
Not all fiscal policy needs a vote. Automatic stabilizers are taxes and government payments that change with the economy by themselves, softening the cycle without any new law.
- In a slump, incomes fall, so people pay less tax. More people lose jobs, so unemployment benefits and other transfers rise. Both leave households with more to spend than they otherwise would — a built-in expansionary push.
- In a boom, incomes rise, so tax receipts climb and benefit payments fall. That quietly drains spending — a built-in contractionary brake.
Nobody decides this each year. It is wired into the tax and benefit rules. Stabilizers act fast and shrink the swings before lawmakers can even meet.
Trap · Common Misconception
"The government balances its budget every year"
Many people picture the government like a household that must match spending to income each year. It does not, and on purpose. In a recession, automatic stabilizers alone push the budget into deficit — taxes fall while benefit payments rise — and expansionary policy deepens it further. That deficit is the point: spending more than you take in is exactly how the government adds demand in a slump. In a boom the reverse happens, and the budget swings toward surplus. Forcing a balanced budget every year would mean cutting spending in a recession, which makes the slump worse — the opposite of what fiscal policy is for.
Check yourself · no marks
An economy is overheating — output is above potential and prices are climbing. What is the right fiscal stance, which tools does it use, and which way does AD shift?
Commit to one first. Guessing and being wrong beats reading the answer cold.
Worked Example
An economy has potential output of 100. Its short-run equilibrium — where aggregate demand crosses short-run aggregate supply — sits at output 92 and price level 96. The government decides to act. (1) Name the gap. (2) Name the fiscal stance and tools that fit it. (3) Say which way AD shifts and where output ends up. (4) State the contractionary mirror in one line.
Practice · 1 / 4
What are the two tools of fiscal policy?
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