So, this is why I'm not a millionaire!
A study by Management professors at the London School of Economics and the University of Massachusetts has concluded that ugly people are more highly compensated than pretty people. And really ugly people made more money than those who were just "ugly."
One psychologist commenting about the study (he was not involved in the study) speculated that very ugly people essentially have no lives, which allows them to focus single-mindedly on their work, which results in more money for them.
Attractive people, and presumably even people who are unattractive but "within normal limits," may have other interests that keep them from shooting to the top of the ladder.
The study conflicts with prior research showing that pretty people have an advantage over their less attractive counterparts.