Money is a part of the problem, or maybe the origin of the whole problem, but at some moment there is a culture that perpetuates itself, and from that point giving more money does not help.

For example, in a group of poor people it makes sense to reduce the concept of private property. To make a mutual treaty of "if someone from our group is starving, and others have food or money, they are obliged to share". At some moment this treaty benefits everyone, so it becomes a part of the culture. But in a long term... as soon as the first job opportunity appears, you would have to be an idiot to take it. It means more work and less free time for you, while your wage is shared with everyone. But you can't go against the whole culture. Except if you leave the group. This is a reason why the motivated people leave; they simply cannot live the new lifestyle within the old group.

Okay, this is too complicated topic to be discussed as a sidenote in a "stupid questions thread". Just wanted to say that "a poor community surrounded by rich communities" is a different dynamics than "a poor community surrounded by poor communities". The difference is the easiness of just going away for all motivated people.