Okay, you got me on a technicality. What I should have said is that banks will lose the ability to create value out of thin air. Zimbabwe can print all the FRN's it wants, but people there still use U$D's.
When government money isn't worth anything then they won't be able to pay their bills with it, except to pay the poor saps who have no choice like employees and contractors.
Thinking that the Dollar will survive forever is to ignore the entire history of every currency, ever. They all die eventually.