As to the suicide question, of fucking course people should be allowed to kill themselves. I'm all for public suicide booths, where highly paid public servants will dispose of your body after providing you with the means and location to off yourself. That's DEFINITELY a positive for society. People getting to check out when they feel like they should, instead of going on to be a drain on society as they stop contributing.
As to paying for drug treatment, I promise paying for drug treatment is cheaper than paying for the crime and punishment that results from the current system.