> but how does that punish the baddies?

I hope we (as humanity) will get over punishment for the sake of punishment. It is a power tool to steer people away from harmful behavior and I don't think we can stop using it altogether anytime soon but it should be used to the extent it actually changes people's behavior - longer sentences not necessary better in this regard than shorter ones in combination with some re-integration program. And if we can prevent antisocial behavior without punishment why not at least try?