Of course it would make far more sense to invest in education and job creation in poor communities of color, rather than spend billions of dollars caging them and monitoring them upon release.
Incarceration rates - especially black incarceration rates - have soared regardless of whether crime has been going up or down in any given community or the nation as a whole.
Nationwide, 1 in 3 black men can expect to serve time behind bars, but the rates are far higher in segregated and impoverished black communities.
Private prison companies are now listed on the New York Stock exchange and are doing quite well in a time of economic recession (and depression in some communities). But that's just the tip of the iceberg.