What the U.S. does is it continues to print money when the economic situation gets difficult. This is what happened in the last depression during the summer of 2008 when they tried to resolve the economic crisis by printing valueless money. This is the business privilege given to them at the famous conference of Bretton Woods in 1944 when the United States emerged as the superpower after Europe and the rest of the world, mainly Europe, that had collapsed because of the war.