Habitant for Humanity is a private, charitable organization with a religious background (faith-based charity, favored by our current leaders). They have a rigorous selection procedure and require some sweat equity. The vast majority of the new homeowners are proud of their houses and keep them up to high standards.
The idea of helping people own a house was initially proposed by Jack Kemp, a respected Republican who was the head of HUD (Housing & Urban Developement) at the time. He proposed that instead of providing "project" housing and/of Section 8 rentals, the money would be better spent helping people buy houses and helping them to build self-respect. This is a perfect example of the "teach a man to fish" philosophy, and it generally works very well.
I'm sure there is an occasional dud. Hell, I've seen people in upscale neighborhoods spend real money on houses and turn them into dumps. Lack of maintenance is not restricted to the poor! It might also pay to look into the specific circumstances of these houses; one might find illness or other legitimate reasons why maintenance has slipped.
I find posts like some of these, which imply that all participants in a program like Habitant for Humanity are deadbeats, are irresponsible at best. Please, please, please, do your research before painting with such a broad brush. I also suggest that instead of complaining, it might be more productive to look into the situation, and help instead of whining if the help is legitimately needed. That's the idea behind Habitant for Humanity in the first place.