I'd be surprised if those numbers weren't even more skewed--- high-profile entrepreneurs like Bill Gates are surely outnumbered by the vast hordes of MBAs, engineers, etc. Recall that 10% of the American working population is around 13 million people! And the cutoff is around $100k in income. A large portion are white-collar office workers at the upper-end of their companies' pay scales, or not even that upper end for technology firms, and people with no degrees aren't commonly found there (take a look at the top 500 employees at Boeing, Exxon, or Goldman Sachs, for example).