The worldwide economy is worse than the numbers suggest and people need fiat to pay the bills.
If they use fiat, they could never payback the bills
Each fiat dollar is backed by a equal amount of debt, when they get 100 dollar to pay the bill, they created a 100 dollar's debt to be paid somewhere else in the society, plus interest. So someone else might get a 103 dollar bill to pay, society as a whole become more and more debt laiden
Ah no you see - that is unfortunately the beauty of fiat, consider this story.
A man stops for a beer in a small town and leaves his wallet behind. The bartender, Fred, collects the wallet and finds $20 in it, after about half an hour with no sign of the man coming back he decides to keep the money. Knowing that he owes Mildred who makes the cakes he sells in the bar $20 he pops round to her shop and pays back the $20 he owes her. She owes $20 to Albert the repairman who repaired her ovens the other week , so she hands him $20 when she sees him. Now Albert owes a local hooker $20 for the quick one they had behind Freds bar the other night so he duely pays her back, and the hooker goes back to Freds bar and pays her bartab with the $20.
Half an hour after Fred gets the $20 back, the wallets owner walks back into the bar and asks if he left his wallet behind. Fred checks behind the bar and quickly puts the $20 back in it, smiles and hands over the wallet.
Net Net, no one lost out and $80 of debt got repaid.
Nice! But there is a net. 1 cake, 1 fixed oven, 1 quicky, & beer. Funny how that capitalism works.