What the Top 1% of Earners Majored In
economix.blogs.nytimes.com
economix.blogs.nytimes.com
However, age is probably the single biggest factor here. Older people tend to be much wealthier and earn far more, and some "tech" degrees like CS weren't even offered (or offered widely) until relatively recently. I would also posit that the rise of very wealthy engineers is a relatively recent phenomenon, compounding the age issue.
Then again, in part knowing the people my mom went to college with, I can't help but suspect that art history is what you major in if you're a bit aimless, yet are expected by your very rich parents to graduate from college.
http://www.bloomberg.com/news/2012-01-06/postrel-how-art-his...
Of course, nowhere from this data can we conclude that your choice of major has an effect on your future financial success. Just that there's a correlation.
Far better, I think, would be to talk about the changing economy and what kind of education is most likely to give people a fulfilling career with a reasonably comfortable lifestyle.
The interesting statistics would be, what skill sets did people apply to make large amounts of money?