It never does. By definition the debt exists because people want to save. If they didn't want to save they'd spend and if they spend it is taxed which closes t

It never does. By definition the debt exists because people want to save. If they didn't want to save they'd spend and if they spend it is taxed which closes the deficit. It's a simple geometric series. Japan has debt to GDP ratios of 268% with both interest rates and inflation near the floor. The mental model people are using is simply wrong.