5. The Role of Government in the Economy

Even in a mostly market economy like the United States, the government plays a significant role -- setting rules, providing services markets will not, and trying to keep the economy stable.

Taxation is how governments raise money. Common types:

• Income tax -- a percentage of what individuals and businesses earn. The U.S. federal income tax is progressive: higher earners pay a higher percentage.
• Sales tax -- a percentage added to the price of goods. Critics call it regressive because lower-income people pay a higher share of their income.
• Property tax -- based on the value of owned property; funds local services.

Government spending funds public goods and services:

• Public goods are non-excludable (you can't easily stop people from using them) and non-rival (one person's use doesn't reduce availability for others). Examples: national defense, lighthouses, public parks. Because everyone benefits and no one can be excluded, private markets tend to underprovide them -- so government steps in.
• Transfer payments redistribute income: Social Security, Medicare, unemployment insurance, and food assistance.

Regulation sets rules for how businesses can operate:

• Environmental regulations limit pollution.
• Workplace safety rules protect workers.
• Antitrust enforcement prevents monopolies.
• Financial regulations protect consumers and keep banks stable.

Externalities are costs or benefits that fall on people not involved in a transaction. A factory that pollutes a river creates a negative externality; a homeowner who plants a beautiful garden creates a positive externality. Governments often tax negative externalities (to reduce them) or subsidize positive ones (to encourage more of them).

The Federal Reserve (the Fed) is the U.S. central bank. It controls the money supply and sets key interest rates to keep inflation low and employment high (monetary policy).

Fiscal policy is the government's use of taxing and spending to influence the economy. In a recession, Congress might cut taxes or increase spending (expansionary policy); during inflation it might do the opposite (contractionary policy).

⚠️ Common misconception: public goods are NOT simply goods provided by the government -- they have the specific properties of being non-excludable and non-rival. Not everything the government provides is a public good in the economic sense.

💡 Tip: on the GED®, look for whether a question is about FISCAL policy (Congress, taxes, spending) or MONETARY policy (the Federal Reserve, interest rates). They are separate tools.