That said, I think it might subside for different reasons.
The demographics of drug addiction are changing. Addictive drug use went from being primarily a poor minority inner city epidemic to something affecting affluent white kids, professionals with bad backs and the elderly. The road from Oxycontin to heroin is a well documented phenomenon[1] that has become all too familiar with the people who pushed for severe punishments for drug crimes.
If your kid could be facing 10 years in jail because he was charged with the intent to distribute a bag of heroin, and that same situation is playing out in towns all over America, suddenly the wheels of change get greased.
[1] http://www.usatoday.com/story/news/nation/2013/04/15/heroin-...