The Wells Fargo problem was not "creating money (or credit) our of thin air." It was fraudulently creating false paperwork to create bogus accounts, for which the creators received bonuses they weren't entitled to.
If you want to see credit created out of thin air look at the student loan program (which is ultimately run by the government). The government is backing loans to people with no credit history and a speculative future ability to repay the loan. However the money is going into the hands of educators who are a very powerful political block, and the students have to pay it back, they can't even get rid of the debt in bankruptcy court.