I was talking about forced military conscription, i.e. what Taiwanese and Korean citizens undergo, not the American prison system.

These systems aren't as bad as chattel slavery because there is a strict legal requirement of when they must end (usually within a year), the citizen remains a citizen (albeit a military one as well) and thus still gets due process (outside of military punishments for, say, defecting or pointing a gun at a superior officer), the citizen can own property while doing their service, they get to do whatever they want with their own money, etc etc etc.

I still think they're wrong, for many reasons, but also because I don't believe there should be militaries designed for human-human conflict.