The phenomenon where the rich own all the land isn't unique to developing nations. In the US, if one doesn't have at least a middle class job, then one cannot hope to afford to buy property. Such a person will rent thier whole life. Therefore, does that make the middle and upper class in the US evil?
Of course, when people look at the developing world though, they compare it to the first world. For instance, someone renting in the Phillippines might live in housing that seems poor to an American, but that American is judging things from an American POV. On the other hand, a renter in the US might seem rich to a Filipino, because people who live in such houses in the Phillippines usually have servants.
As a side note, the tropical climate isn't that harsh so a lot of people live in simple wooden dwellings. It isn't a shame there. Assuming the area has plumbing and access to electricity, there isn't much to complain about. Of course, in some cases a community well is used for washing, but a lot of times, due to the culture, nobody sees it as shameful, as though their area is a ghetto.
Again, I see a lot of this obsession with wanting to have home that look American, or the fact Americans view thier homes as vastly better is because people are obssessed with status symbols.