As Bill Maher said:
"Obama should acknowledge that putting people in jail for non-violent drug offenses was a giant mistake in the first place, and then he should use the power of the Presidential pardon and free them all. C'mon, you know you want to. You've been stingy with those pardons. Here's a great way to make up for it and there's plenty of precedent. Lincoln, a Republican, pardoned the Southern rebels after the Civil war. Ford, a Republican, pardoned Viet Nam draft dodgers. Ronald Reagan signed an amnesty for 2.7 million Mexican illegals. If Republicans can forgive people for armed insurrection, desertion, and speaking Spanish, a Democrat can forgive us for getting high."
Prison, instead of treatment, for non-violent drug offenders is expensive, inhumane, and wrong.