Somewhere as a shite RAF corporal in 1949, I was issued with a book called 'The British Way and Purpose'.
Basically it answered a lot of the so called questions. Ironically, it still seems to be available today.
Probably Prince Harry nailed it- as other Prince Harrys did centuries before- bring back National Service!
One thing that us old farts seem to agree is the old Colchester Military Detention barracks seemed to cure about 98% of the wrong doers. I went once as escort which was enough for me.