> Punishment does work.
I should clarify. I think punishment mostly makes the punishee angry with the punisher. I don't think that they generally feel like they are paying their penance. If they didn't already think that what they were doing is wrong, I really don't see how they are going to suddenly start just because they were punished.
I generally think that the way that Scandinavia does prisons is better. I think that punishing people specifically with the intent of making their life worse is viscerally satisfying (the retribution part of that quote), but I think it's not actually a good thing to organize a society around increasing suffering. The US has a higher murder rate than Western European countries, despite having stricter punishments, including the death penalty. There can be thousands of factors that influence that, obviously, but it doesn't seem to be massively deterring crime.
I think prisons are basically a necessary evil; there are certain people that are antithetical to a functioning society, and so it's probably better to separate them from most people. I think the point should be, though, to not view these things as "punishment" but more "a chance at reformation".
Prisons in the US used to have college education programs, and job training programs, so that when you left you had a means of supporting yourself that wasn't criminal. If I understand correctly, this is still the case in Sweden, and I think that's a good idea.
Now of course, there are humans that are so warped that really no amount of job training is going to help them (e.g. a Jeffrey Dahmer), and at that point you really do just need to treat it like punishment.