His belief was that tax money should be spent on rehabilitation instead of the drug war. Shouldn't you be against using tax money for this and instead supporting private charities?
Therefore, it's actually better and fair to use a small tax for rehabilitation than it is to use prisons to keep drug users locked up. This is according to the Libertarian point of view.. Strictly Libertarians are against tax, however in this case a more middle road can be argued for and be within the Libertarian's view.
So true. The privatization of jails in the US seems to be the root cause of this. Private jails want to increase profits, so they lobby for “3 strikes” laws that play well for politicians who want to seem “tough on crime”. The end result is a lot more people in jail, but without the reduction in crime and certainly absent of actually helping people stop their drug habits.