Banks don't create money out of the air. They don't. There is a demon called inflation. As soon as the banks continue to print more money, that demon will begin to devour them and the price of the currency will decrease until it becomes more expensive than the paper on which it is printed.

Central banks try to maintain some measure of balance, and it is the poor that pay the price, not the rich.
Here the problem lies not in printing money.
Printing money is a symptom of a disease.