Total compensation seems to peak about 10-20 years after graduation.
There's more data than the two pages below, but they're enough to get the general idea.
US income inequality caused by financiers and tech entrepreneurs (2006)
The illusion of skill
Top 1 percent by profession
Financier pay: it's crazy, there's no 2nd or 3rd (2007)
A New Class War (2006)
The Haves against the Have Mores. Pity the poor doctors, lawyers and management consultants. Even the I-bankers, now that hedge fund management has become the ne plus ultra of capitalism. The only guys that the hedgies envy are the super-lucky entrepreneurs who can make their centi-million all in one pop!
As far as doctors and lawyers, I once asked a friend of mine in finance, who lives in a 3000+ sq ft apartment on the upper east side, who else lived in his building. After counting all the money guys, he let slip -- "Oh, I guess there are some doctors and lawyers as well. I don't know how they can afford it." You're so money, and you don't even know it!