As the FG spends, the number of Dollars in the PS pot grows. If the number of goods and services available for people to buy in the PS pot does not grow by an equivalent amount, the additional Dollars flowing in will cause prices to go up—perhaps dramatically. This is the “inflation” that Congressmen and economists are constantly warning against. To prevent this from happening—or to prevent the rate of inflation from getting disruptively high—there has to be some means for taking Dollars out of the PS pot.