Sure, there are certainly people who hold that justice can only be achieved if the perpetrator pays in pain, with any discouraging effects being incidental. On

Sure, there are certainly people who hold that justice can only be achieved if the perpetrator pays in pain, with any discouraging effects being incidental. On the other hand, there are also plenty of people who want to reduce the amount of crime that happens, and then they are more concerned with if the justice system actually achieves this goal. Pain based justice plainly doesn't.