You are correct to infer that it is not a good idea. It will eventually cause massive inflation here in the U.S. as well, but the current debt load will not bankrupt the U.S. government. They will inflate it away. Zimbabwe didn't borrow in Zimbabwean dollars, they borrowed in other currencies which they could not print themselves. The U.S. is unique because we, and we alone, issue the global reserve currency. That is most likely in the process of ending, however.

My glib answer is: in Iraq, under U.S. military protection, with a properly installed puppet government to lend an air of legitimacy. But what exactly are you asking, in case I misunderstood you?