Just an idea, how about, instead of putting them through the army, we put them through a strict grammer school, where they have to get 5 GCSE grade B or above, Cant leave, Are tought manners, and the best thing about this school, is that instead of just beng carbon neutral, its carbon negative, so they have to live very eco-friendly lives.
that would shut criminals up, and get them sorted for life! isnt that what we want?
also, if they do not meet very high graded exit tests, they have to stay again.
Hows that for an idea?