One interesting thing that came up in Darin's talk at San Diego was that many of these slum dwellers are not really poor. But since all other alternatives are very expensive, they convince themselves into living in slums, thinking that it is only for a short time.. and then they are never able to get out of it. Darin's video showed that as soon as some of these people were transferred into the high-rise, they bought TV, nice furniture etc!