Stop imprisoning people, too many of whom are veterans and minorities, for non-violent crimes. Instead, have them do community service and/or use their abilities to help individuals care for their yards or homes, etc. It makes no sense to spend more money on a prisoner than a student for something like drug possession or sleeping in a park.
Shift the focus of the criminal justice system from retribution to rehabilitation. The current system is monstrously inhumane and succeeds only in multiplying the harm done to society through the vastly disproportionate criminal population. Comprehensive prison and rehabilitation reform is necessary to make up for the damage that continues to be done.