If there is infinity backstop, I will simply create a bank and lend millions to my friends and promptly go bust. They get paid out by the government and I walk away. They do the same for me. We laugh at the poor taxpayer who foots the bill.
This won't happen for the same reason people most don't just burn their house/business down for the insurance payout. People lose insurance all the time this way even if they're just unlucky. Like any insurance company, the FDIC can and will drop a bank and isn't obligated to insure a new one if it's run by unreliable people.
If there is infinity backstop, I will simply create a bank and lend millions to my friends and promptly go bust. They get paid out by the government and I walk away. They do the same for me. We laugh at the poor taxpayer who foots the bill.