Read Gary Goodman's answer to If the debt ceiling is not raised, why can't the treasury simply print the money it needs to pay back the Federal reserve? on Quora

Simple. We move a few numbers over from one bank account to the other. The government isn't going to run out of money to spend. Nor is going to go bankrupt.

Listen below to the former Chairman of the Fed - Alan Greenspan as he "schools" Paul Ryan in the fact that there is no issue with government ever being able to pay for something:

Read Gary Goodman's answer to If all countries have their own money printing machines, why is there still national debt? on Quora