The idea that any person is immutably a "criminal" is as passe as the xenophobic belief that certain ethnic groups are innately violent, untrustworthy, or simpleminded. It's a failed ideology that justifies selective dehumanization.

And conversely, how much value in contracted services performed by potentially wrongly incarcerated people performing un- or under-compensated labor are you willing to accept? If they're paying for the privilege of their own imprisonment, it should at least include rehabilitation.