As someone who is wrapping up a 30 year career the simple answer is money. I've seen numerous rational, smart, common sense employees turn into closed minded, protect my turf at all costs and d@mn the consequences m@rons after they get several years of six figure bonuses and tens of thousands of stock options or grants.
Bad news doesn't travel well and is not rewarded AT ALL. Rather its best to cover up, obfuscate or blame someone else if something bad happens under your purview to protect the gravy train.
Rather than address substantive issues and get them resolved, hire a consultant, spend millions in work arounds or more processes and procedures that band aid a problem.
A couple of examples: the retail account opening scandal was well known by front line employees but rather than address the ridiculous sales goals, they beefed up investigations, instituted processess that essentially nuked a branch if they found wide spread cheating and encouraged managers to look in the other direction if the situation wasn't too egregious. Another example is the asset cap; instead of making it job #1 to do whatever is needed to get the OCC comfortable in lifting the sanction treasury is busy fanagling the balance sheet, account officers are told we can't lend in certain circumstances to "preserve capital" and focus on revenue growth.
It's very sad to see what a sh$tshow this place has become.