Sure, there are things banks can do, and those are features they can market. But ultimately, if the state isn't pursuing criminals who prey on the vulnerable, then society as we know it has failed and we would need a new society, or a new state, or both...The bank can't arrest anyone!
I never said anything about it being Googles responsability, I agree it is not. And the only legislation that might be necessary over what we have is a budget directly to go after criminal fraudsters.