What occurred at Wells Fargo was ridiculous and it's congresses duty to insure that laws are in place to prevent it from happening again. Sure some of these hearings are about show boating but thats the only way US voters respond.
The work behind the scenes to close any gaps in the law in order to prevent shit like this is immense and requires a lot of boring negotiation and footwork.
To the average voter, the real work is meaningless. They demand the soundbite in order to have confidence legislatures do anything that they will completely forget about.
The culture at Wells Fargo is something that flows down. CEO is sets that and its the team established by the CEO that puts that into place.
Having said that, this is a sign of a bigger problem and that's the shitstorm occuring in the financial industry. Bubble is popping.
Some of the numbers are 35% decline in workforce, massive offshoring impacting everything from the big names to local credit unions. Low rates, changes in tech and a flood of competitors have pretty much caused a big load of hurt on retail banking.
Some institutions are dealing with that pressure while maintain ethical behavior and practices.
Other places like Wells Fargo are not.