Not sure why you are being downvoted here, but this is a true statement. Most private prison corporations have occupancy clauses in their contract that mandate either (a) 100%+ occupancy before building a new prison, or (b) in place of occupancy the state can elect to pay a higher premium per inmate. The US legal system is built on fulfilling the occupancy rates to avoid the higher fees.

http://www.inthepublicinterest.org/article/criminal-how-lock...