The federal government has played the predominant role in designing and financing government-provided welfare since the 1930s. Of the more than $1.1 trillion spent in FY 2016, federal expenditures accounted for $829 billion (74 percent), and state expenditures accounted for $297 billion (26 percent). Most state spending ($213 billion) occurs in a single program: Medicaid. If Medicaid is excluded from the spending count, about 85 percent of the remaining means-tested expenditures comes from federal funds.
Federal welfare spending is spread across 14 government departments and agencies, nine major budget functions, and 89 separate programs. Spending levels for many programs can be discovered only by data mining the annual 1,300-page budget appendix produced by the Office of Management and Budget (OMB).
The means-tested welfare system provides nine different categories of assistance to poor and low-income persons: cash, food, housing, medical care, social services, child development and child care, jobs and job training, community development, and targeted federal education programs. In each category of assistance, government provides assistance to poor and lower-income persons that it does not provide to the general population.
The financial cost of the War on Poverty has been enormous. Between 1965 and 2016, total means-tested welfare spending by federal and state governments cost taxpayers roughly $27.8 trillion in constant FY 2016 dollars. By contrast, the cost to the U.S. government for all military wars from the American Revolution to the present is $8 trillion in FY 2016 dollars.In other words, the War on Poverty has cost the taxpayers nearly three and a half times the combined cost of all military wars in U.S. history. The most expensive military war in U.S. history was World War II, but its cost was only $4.3 trillion in FY 2016 dollars: about one-sixth of the ongoing cost of the War on Poverty.
https://www.heritage.org/welfare/re...-11-trillion-welfare-system-and-how-reform-it