On. Yu. Mamedov. Modern economics (№ 464840)

We know only three market subjects - the household (population), the firm (producers), and the government (the apparatus of government officials representing society and its economic interests). Households and firms must include their expenses into their income. They can, of course, spend more, but it will be borrowed money that must be returned within the agreed time frame, and with interest. Only the state is in a different situation - its expenses may exceed its income.