According to our media, some people, some places are just poor, and some people, some places just aren't. Not for any reason (Pat Robertson devil comments notwithstanding), they just are. The only major exception is when someone or some place is poor and, we're meant to believe, it's their own damn fault. Aside from that, though, it's just natural law.
They never really say this, mind you. But they never actually talk about the reasons for poverty, and why it's located where it is. It's such an ingrained assumption in everything they do that if you removed it everything they've built upon it would fall apart. And it's such a powerful subtextual message that almost everyone (including myself, when I catch myself in unthinking, atavistic moments) believes it without ever having to be told.