in Saudi Arabia, the skilled technical work is done by westerners, and the grunt dirty work is done by people from third world countries.

There certainly isn't any shortage of skilled, educated people from Middle Eastern countries. So if an inequity of this sort exists, I find myself wondering if it is because of a policy of the repressive Saudi Arabian regime. A regime that is in power because of its being propped up by the US as a part of its effort to secure US oil interests in the Middle East.