rabbitstew - don't forget that the investment banks are global businesses. They have offices around the world and the people who work in London are from everywhere. You would find lots of americans, greks, french, germans, eastern europeans, australians, etc.etc.
In London, I worked in an office with: Greeks, French, Irish, Americans - both new englanders and californias- , NZ, Australians, South Africans, a man from Uganada, Finns, Germans, dutch, Israelis and a Gaza Strip arab.
Actually, that alone gives the lie to the other posters "strange surname" filter.
The media and politicians have been enjoying the whole greedy bankers story for years. I think they keep going because of jealousy and because its so popularist. However, on the ground that's not the main cause of the problem. The cause boiled down to things becoming so sophisticated that no one really understood them or fully knew how they were correlated because it was beyond the human brain. It was just another investment bubble, just like the one that's bursting in China atm.