3) Credit acts as a lubricant in the economic process due to which transactions are smooth. Lack of credit may result in the slowing down of the economy.GDI of the household is called disposable income which includes wages, profits distributed, interest, rent, and royalties by the businesses and transfer payments by govt. fewer taxes, social contributions, and transfer to foreigners. The business sector’s share is called business saving which comprises depreciation allowances, undistributed profits, and inventory revaluation if any. Government income comes through tax receipts, fines, and license fees, but not from borrowed funds, but it passes back a substantial proportion of its income back to households and business as transfer payments.which shows that current domestic production generates current incomes that are just equal to the amount needed to buy the product. Though price level changes do not impact GDY they may redistribute the income among HY, BY and GYIncome levels and expenditures need not necessarily be equal. People may choose to spend less than their income thus saving the remaining part or spending more than their current income by dissaving past savings or borrowing.If all the sectors budget surpluses, when added, give out a positive number then GDY gt. APE or GDP gt. APE, which would mean that some output will not sell which may lead to recession while if all surpluses when the added result in a negative number then there will be inflation as demand will be higher than the current output i.e. GDP lt. APE. Thus GDY or GDP has to be maintained equal to APE.When the government finds it has to spend more than it receives as tax revenues then it runs a budget deficit. There are two ways to arrange money to spend more than taxable income. One is to print dollars, which does not usually resort to, and the other one is to borrow. The government borrows by issuing treasury securities to households, businesses, local governments, foreigners, and international organizations.