The issue with jailing bankers is that nothing they did was illegal. It was highly immoral but we don't jail people for being immoral (they do in some countries).

If you want to jail bankers in the future, supporting institutions like Consumer Financial Protection Bureau and electing politicians that want to pass more strict laws is the only way to accomplish what you want.

In this diametric political climate we have one party that is gutting the CFPB by installing leaders that are pro-finance/banking industry and rolling back protections under the guise of "not being fair."