Why are banks allowed to create cheap credit out of nothing and when the bubble eventually bursts the banks are always saved by the tax payers? What i an tryin

Why are banks allowed to create cheap credit out of nothing and when the bubble eventually bursts the banks are always saved by the tax payers? What i an trying to say is private investors in the banks and its debt profits during the good boom time on the loans but the tax payers pays for the losses after bubbles burst. This is not pure capitalism it’s something else. Big thanks goes out to all coders working on block chain technologies! You will change the world to a better place!