Wells Fargo Hit with $1B in Fines
A fine isn't going to hurt Wells, especially when it's about two weeks worth of profit.
If you want to teach a bank a lesson, you have to hit their business model.  If after a fraud is uncovered regulators instituted restrictions to account openings instead of fines, you would see change.  For example, if Wells wasn't allowed to open a new account - of any kind - for six months they would start to lose customers - and bankers - to institutions without restrictions.  That would change the industry.