When trying to comprehend a trillion-dollar deficit, you might calculate how much money that represents per person in the U.S. One trillion dollars divided by 300 million Americans comes out to $3,333. Then you search for a useful comparison. A convenient — though perhaps unsettling — comparison is to the amount of credit-card debt carried by the average person in this country. That figure is $3,245. So a good way of thinking about government debt financing is that it's similar to what the average person is doing.