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No no no no no no and thrice no again! That is absolutely NOT the answer Andy.
For heaven's sake, these guys/gals operate in a GLOBAL economy. If we take a typically socialist (legislation happy) attitude to entrepeneurship, they will go overseas as you want, but take the whole investment banking industry with them and UK PLC will lose tens of thousands of jobs. Blimey, at least Gordie understands that much.
His tack is to try for a global approach to solving this matter. He doesn't stand a chance of getting global agreement, but fair play to him for trying. Cameron meanwhile focusses on trivia and that is probably why the Tory score in polls is slumping.
The nature of the investment banking industry is one of taking financial risks to make high profits, the result being the only thing that matters. Profit = bonus, Loss = sack. There is no middle ground and only the talented survive what is a very short career anyway. And before we send out the lynch party, who foresaw a global meltdown? Nobody.
I'm sorry, I feel very strongly that we should stop knocking and get behind our industries and do whatever we can to make them stronger, whilst at the same time understanding that sometimes, things don't go as planned.