This works quite well in the UK. Registered junkies get their methadone from the pharmacy each day, a cup full of stinky green.
I worked in a chemist and got on very well with the green gulpers, down in one and open wide afterwards.
They used to hold it in their mouths and spit it into a bottle for resale when they got outside the door, not any more.
Giving methadone to prisoners without opioid dependance would most likely do the same.
Let's switch to buprenorphine and I'd be willing to bet it would go down even further
They should use the prison to farm marijuana for dispensaries and give the prisoners free weed. That should stop the violence.
Are they sure recidivism wasn't reduced as part of their new training at the Method One Acting Clinic?
Fuck methadone. It keeps the sick sick and is easy to OD on. Ibogaine is a healthier, long term non addictive solution.