Ponder this. A major Western power had a contingency plan to cancel one currency and issue another within days. Money is an illusion. It has no inherent value. This is why allowing unelected elites to create it in unlimited quantities from nothing is so stupid, so unfair, and so likely at or near the core of nearly all our problems.
My plan is not crazy (I will note I have evolved it since, but been locked out of my own website because the software I used stopped working; the net idea, though, of paying off all debts using a nationalized Fed, then revaluing the currency and never changing its quantity again, remains.)