I actually don’t disagree with most of what you’re saying. I’m mostly pro-capitalist but anti-crony and anti-corruption which it sounds like you are too.
Maybe I’m just misunderstanding, so I’ll try and clarify:
If a bank earns 1% interest, that doesn’t grow the money supply.
X$ exists.
Banks loan out 10*X$ (or whatever).
The loaned money is debt and so doesn’t change anything because the cash and the liability counter each other.
The bank charges Y$ in interest.
After the debt is repaid, the bank has X+Y$
You’re saying that because the Y$ comes from somewhere, it’s not inflation. However as banks are profitable, they clearly have more money left after paying salaries, wages, costs, and dividends.
As long a the money that the bank has is growing, the amount they can lend is growing which means the pool of available money is growing.
It might not be “real” money (I’m probably misusing the term “money supply”) but it doesn’t change the fact that more “money” is available.
Raising interest rates means people borrow less which means banks make less money and grow slower. If this were to keep up eventually the banks would lose money and the amount of loans they could give out would decrease and the available money would decrease. Which might finally put an end to this rampant inflation.