The primary function of the tax system is to fund government expenditures. Many United States government programs are funded solely by certain taxes. These programs include Medicaid, Social Security, Welfare programs, Subsidized Housing, and many more. Without taxes, the U.S. government would not be able to afford to keep running these programs, which help many individuals in need. Taxes also fund and support many other public services like school districts, police and fire departments, public roads, and emergency medical services.