It'd maybe concentrate a few minds. At the moment, bankers know they can damn well get away with it, and even if the very worst happens, they'll have made a pile of cash by the time they are caught out.
Whole financial services industry is riddled with corruption, fraud, exploiting consumers and bad faith - we need a Leveson enquiry to clean out the Augean stables. And it should ask what the hell has happened to our pensions, as well.