What should be the role of the government in societal and economic changes? (5 + sentences)

By adjusting spending and tax rates (known as fiscal policy) or managing the money supply and controlling the use of credit (known as monetary policy), it can slow down or speed up the economy's rate of growth and, in the process, affect the level of prices and employment. However, according to Samuelson and other modern economists, governments have four main functions in a market economy - to increase efficiency, to provide infrastructure, to promote equity, and to foster macroeconomic stability and growth.