The trust that VICTIM will get justice keeps the society intact. Nobody cares what happens to the bad guy.
If someone took out all your money through fraud and gambled it away, what would you choose:
A) Justice: Put them in Jail for long time.
B) Rehabilitation: Put them in medical care for an year till their gambling addiction is cured. Then they are free to integrate back into society.
In both cases, you get no money back. What would you prefer?