I don't think you understand how the fed works. Down below is the link on how it works:
https://steemit.com/economy/@brittishbear/how-the-us-money-system-works-the-intro
By the way it is comercial banks that lend to the people. People want to live in houses they can't afford, etc so they go to the bank to borrow. Lending is cheep right now but it can't last like that forever. We need to be taught how to finance our money properly but that will never happen.