I recall reading a critique of the US prison system which said it has a tendency to turn B's into A's. I'm not sure how true this is, and I can't quite recall

I recall reading a critique of the US prison system which said it has a tendency to turn B's into A's. I'm not sure how true this is, and I can't quite recall the exact mechanism which was outlined -- I think it was something along the lines of giving B's months or years of 24/7 exposure to an environment where being an A is common and socially acceptable.