The problem is that there’s double dipping and profiteering. The prison company gets paid by the government for the same it costs the government to house prisoners and then contracts out the prison labor to private companies for basically pure profit. Private prisons’ ability to sell slave labor is a perverse system. The government doing so is at least marginally less but still exploitative in that it robs prisoners of their humanity and feeling like they’re part of the social fabric. Pay them a living wage for that effort and they start to learn that there’s respect and reward that come from being integrated in society.