Like the old saying goes:
If you owe the bank $100,000 the bank owns you.
If you owe the bank $100,000,000 you own the bank.
Well let’s see, the banks owe the Fed some $150 B and the Fed is basically using our money.
But! We don’t have any direct democratic influence on the Fed. So... who owns what?
Not if the bank can print money. The banks may owe the Federal Reserve $50 billion, but it doesn’t matter what happens to them, the Fed will never go bankrupt (though technically it may become insolvent—I’m not quite sure how its balance sheet works).