Apparently the ISSP is 'second only to custody in its severity'. Ha!
I repeat for the umpteenth time - you can only use disposals designed to rehabilitate on those who show evidence of desiring to change. In all other cases they are utterly worthless.
Punishment of great severity MUST return to the system in order to promote fear in such as he! Fear in society is not wrong. Spongers and criminals should be afraid. It is a concept they would grasp when they grasp no others!