Much of my family is "top 10% in a developing country." Yes, they can afford people to make their food and clean their houses. That's just because of how poor everyone is, and there is a very negative aspect to that situation as well.*

But if you look at their apartments, personal possessions, etc, their standard of living is comparable to people living in public housing in say the Bronx.

*) My dad once asked one of our servants, a young man maybe 18-19, to go buy a pack of cigarettes. He came back without the cigarettes, telling my dad "I'm sorry, I couldn't buy them--they were [as much as he made in a week or two]." He never asked him to buy cigarettes again... In general, its extremely awkward to have domestic servants in poor countries because those people are actually really poor. Their kids have no opportunities. They'll work until they're dead with no hope of retirement.