You do realize, of course, that there is a HUGE disparity in the salaries of (for example) what you would call "white Americans" in Doha by as much as twenty-fold or more. This is due primarily to differences in education, occupation and experience. If it were only due to skin or passport color there would not be nearly the range of remuneration offered. Let me add parenthetically that it does take a good deal of salary to entice an American to move here because we still pay our taxes at home.
Mandi