The people that complain about obscene wealth. (when its actually earned... not like certain heads of state in the world) tend to feel they are entitled to more than they have earned. Most of the same people don't want to work as hard or take the same risks to get ahead. Some just aren't smart enough or good enough at what they do to make more...
It all boils down to envy... much more than greed...
Funny how the same people that think CEO's are overpaid... (who actually do work hard for it because I know a couple really well) think nothing about what certain actors or athletes get paid. That's where obscene actually applies.