Government purchases include spending on goods and services by

Local, state, and federal governments.

Explanation:

Government purchases are purchasing of gross domestic goods, items and services which depicts actual expenditures of the government section for public consumption,capital transfer public investment etc.

It does not consist of transfer payment in its expenditure.Spending of government purchases and services are done by local government, federal government and state government.

answer; i believe its called ; checks   and balances;