Money represents the working clas, well, working. What if they put it in terms of individuals time they owe working to the government? We're already working two of five days to give to the government.

"Hey everybody. In addition to the Thursday and Friday you're required to give work for the government weekly until you're 65, we're now going to require your Wednesday afternoons be flipped from providing for yourself to now being given to the government. K thx bye"

People would freak out if it was that direct. So instead we use fiat currency to just hide the slavery. The inevitable end result of the expanding-debt based system we have is the many being completely enslaved to the few.