In the late nineteenth century, coal companies wished to keep their skilled prison laborers for as long as they could, leading to denials of “short time.” Today, a slightly different economic incentive can lead to similar consequences. CCA [Corrections Corporation of America] is paid per prisoner. If the supply dries up, or too many are released too early, their profits are affected . . . Longer prison terms mean greater profits, but the larger point is that the profit motive promotes the expansion of imprisonment.35