Should we create more socially mixed residential areas, where rich people live next to poorer people, instead of in separate communities?

In Brazil, and to be specific, in São Paulo city, having very rich neighborhoods close than extremely poor neighborhoods is a reality. As an example that can be mentioned is the Morumbi, a rich neighborhood, place known for the huge houses and fancy buildings. Although, Morumbi is also known to be localized near by a large poor community, the Paraisopolis favela. The contrast of those two neighborhoods is the picture of social inequality at country.

This question is not too easy to be answered. After read the question quickly, the first answer that happened in my mind was: ‘yes, of course should have more socially mixed residential areas’. But, if you stop and re-read the question, with more attention, might you will be face a uncomfortable feeling inside your head and probably would question yourself: should have very different type of habitation from another one, that we need to wonder whether they can share the same places  to each other? To me, this question should be answered as no.

Admittedly, the social inequality is a reality for countries in development, as Brazil. But this scenario can change, and I believe it will. If the government invest to reduces the social differences, creating politics incentives and favoring the economic situation on poor neighborhoods, to get better places to live, socially mixed residential areas will be our future reality, where all people will have a decent life, with the same opportunities, and less social contrasts.