There is NO evidence that jailing drug offenders—particularly those using so-called "drugs" like marijuana—does any good, and PLENTY of evidence that it does harm to them and to society at large. Shorten the sentences, let judges do what they are meant to do.
Moreover, we MUST remove the profit motive from the prison system. It CANNOT be a for-profit business, Because that creates a massive, destructive conflict of interest. That needs to end. Now.