One minor problem. The American economy does NOT operate on money. It operates on debt. A dollar bill is not money. It's an IOU.
Same for credit cards. The amount of debt a department store credit card can add to the economy is staggering. That's not evening counting the interest they charge with is usually pretty high.

I recall back in the day that I heard that Sears made more money off their credit cards than they did off of their merchandise. Dunno if that's true.