I think Oz should take a real close look at how well prohibition has worked for the US and our meth issues.
Treating it like a health problem, and thorough education are IMO MUCH better strategies than criminalizing people (great idea, lock them up with other tweakers with nothing to do but learn how to cook dope). Prohibition just simply does not work, just like it didn't work in the US for EtOH. All that happens is more health problems and too many people in jail for the wrong reasons.
It's human nature for people to want to manipulate consciousness. Telling people they can't get high is like telling people they can't fuck each other - shit ain't gonna fly, ever. The best way to deal is EDUCATION, straight up. Incarceration isn't the solution, and really it just creates a bunch more problems..