So you did say that then, it's their fault they're put in a situation where poorly paid or unpaid labor is the best thing they've got going, and have little to no choice but to work. Nevermind that laws are frequently improperly enforced, and are often even written specifically to keep the prisons full (instead of making society safer or healthier).

Claiming you didn't suggest something and then doubling down on it is an odd strategy.

And are you suggesting that there are no innocents falsely convicted as well?

The prison system in the US is a textbook example of a perverse incentive.