Middle class neighborhoods are going away:
The fact that the rich have walled themselves off is also troublesome, however. By self-segregating, wealthy families pool their resources in just a handful of communities. At the same time, they’re less likely to know middle-class neighbors and may be less likely to care about what’s happening in less fortunate corners of their city or town. As Bischoff and Reardon note, the more the rich keep to their own, the less reason they have to worry about public schools or parks for someone else’s kids.