Something to think about : nature abhors a vacuum.

DETROIT—More than 20% of Detroit's 139 square miles could go without key municipal services under a new plan being developed for the city, with as few as seven neighborhoods seen as meriting the city's full resources.

Those details, outlined by Detroit planning officials this week, offer the clearest picture yet of how Mayor Dave Bing intends to execute what has become his signature program: reconfiguring Detroit to reflect its declining population and fiscal health. Yet the blueprint still leaves large legal and financial questions unresolved.
http://online.wsj.com/article/SB1000..._WSJ_US_News_5


So if wealthy neighborhoods can afford this -

One NJ Neighborhood Opts for Private Police Force
http://www.nbcnewyork.com/news/local...112341519.html

---what fills the vacuum in poor neighborhoods?