It's the rules. White collar criminals are often smart - they know not to escape because they are able to plan ahead at least short windows into the future. (they wouldn't be criminals if they could plan long term). So the prison doesn't need bars or guard towers, just a daily roll call. If you escape they send you to a higher security facility.

They don't necessarily riot or destroy property, and they often have money stashed to afford the prison staples. If they do escape they don't necessarily murder or rape, maybe a little conning.

I'm just saying - some of the suffering violent criminals and poor criminals endure is because the prison HAS to be built like that. Another problem is the state prison system is inconsistent, some state prisons are hell on earth, others are probably about as nice as a federal prison.