Bring back public pillories and stocks. It will Let everyone know that you are a thief.
I like various forms of corporal punishment. People should experience extreme psychological trauma which really burns the key idea into their brain: “I should not have done what I did.”
I also like capital punishment. There are a great many people whose behavior is an indication that they ought to be permanently removed from society.
There is very little about our current justice system that I like.