Just shoot all law breakers. Problems solved
It is expensive to dispose of the body unless you are doing it on mass scale and don't care how it's done. I think the cheapest would be to push them off the cliff.
Otherwise you either cremate or dig a large hole and just bury them. Another alternatively you feed them to animals like tigers, hogs, sharks etc.
All which require someone to be paid which will cost us taxpayers money. The benefit of not having someone must be > than disposing of them.