Flora said, in her comment....
Take for instance how an expat who is doing great social work helping orphans but living in a lavish mansion driving one of those posh cars, going out only to expat hangouts and functions, will seem to the middle or low class nationals;those living in the other world.Though this hypothetical COULD exist, for the most part, I don't think it does. There are a lot of different kind of wazungu in Africa, but generally, orphan workers don't drive luxury cars. They tend to be young, idealistic ones who want to do something before they burn out. The expats driving luxury cars are the ones working in advertising firms, at embassys, at places where they make dollars instead of shillings. That's how they afford those cars. The people working with orphans don't make dollars, or often anything for that matter. So maybe they're trust fund babies who can afford to take a year off from their studies to come here and do good, but at least they're not living in New York spending their time shopping and putting money up their nose like the rest of the trust fund babies.
I leave that to you.
I just think that at the end of the day, there are different kind of expats here - the ones with cars and the ones without - to oversimplify.
I'll stick with bodas and taxis for now.
(By the way, actually met a mzungu guy the other day who works not in nonprofit work and lives in Kololo and to quote, "When the water went out, I was like, man, I'm ready to go home!")