I think a lot of folks have a fundamental misunderstanding of how loans work. The banks don’t get to just magically conjure up as much money as that want. It is backed by actual money/assets and federal regulations require a certain ratio between what the bank has loaned and the amount of money they have readily on hand.
I agree that it’s not a perfect system, and I definitely think “businesses” that offer those sketchy payday loan arrangements should be illegal, as they often price gouge the shit out of the interest rates (in fact, I believe many states have outlawed them). But I don’t know of a better solution that isn’t dependent on a utopian-esque idea.