A government's monetary policy is its plan to control The money supply.
Explanation:
The supply of money as termed in the question can better be understood as regulation of the flow of the economy.
The governmental fiscal policies are usually related to maintaining long term investment rates and interest rates along with controlling of inflation and portioning steady employment through the flow of economic growth in the country.
All of these are achieved by the fact that it is basically a regulation of the flow of money that is regulated by the government.
The government does control the market economy they may also ensure national security by not allowing businesses to transact with enemy countries and providing services that are not typically handled by private business.
