Yeah I learned a bit about the US system after reading posts on here a few weeks back. But it's possible to have prisoners 1) being productive for the economy, 2) learning skills, and 3) gaining self esteem. I wouldn't advocate privatising such schemes, as it's open to abuse, like in the US.
Well they didn't plan it that way.
So on the one hand, you don't want them to be caused pain in death, but on the other hand, you want them to suffer misery much worse than pain in death. That seems mixed up to me.