Bollocks, SWC, sorry. It would be a rather funny world if I hadn't met my son's godfather. He is a top investment banker and is paid shitloads, for doing things like taking clients to fancy restaurants and strip clubs. you could call that working long hours I suppose. 
I'd guess in terms of real work, my other friend the retail banker puts in pretty much identical hours, actually.
Possibly investment bankers lower down the food chain put in longer hours, I don't know. Higher up, they don't.
Should also add that this guy is not especially, uniquely bright - he's pretty good at maths, but got a 2:1 in a numerate discipline, same as the other banker. So hardly genius level. He's quite personable and has a good eye for making money, and is primarily motiovated by money. But there is no logical reason whatsoever why he should make more in a year than the other banker may make in a lifetime, none at all.
The system is completely screwed.