Nice couple of charts that show correlation between what occurred when financial markets were deregulated and the outsized compensation packages that subsequently followed.
The book does a nice job showing how one led to the other — that there was both Correlation and Causation.
chart via NYU
Here is a similar chart, with major regulation/deregulation included (I seemed to have lost the WSJ link — if anyone has it handy, please let me know!):
Wages and Human Capital in the U.S. Financial Industry: 1909-2006∗
Thomas Philippon, New York University
Ariell Reshef, University of Virginia