? "Spending financed not by current tax receipts, but by borrowing or drawing upon past tax reserves." , Is it a good idea? Why does the U.S. run a deficit? Since 1980 the deficit has grown enormously. Some say its a bad thing, and predict impending doom, others say it is a safe and stable necessity to maintain a healthy economy. When the U.S. government came into existence and for about a 150 years thereafter the government managed to keep a balanced budget. The only times a budget deficit existed during these first 150 yea ....