I never said it was okay to do illegal drugs. Never did I even infer it. As I recall, I DID say "I don't care how little you take it, it is a problem bbecause it is illegal." Which should be good enough sign that if you're doing something illegal, I don't care what it is - it is illegal and you should be punished properly. You asked me about people who use those drugs for medical purposes, and I responded how I did. How can you jump from that to me saying "Well, if they have a prescription for it, then they can go outside that prescription and get it for themselves and it's okay?" No. If they have a prescription, then they have a prescription. Show the prescription, show your prescription bottle/container, your ID, whatever else they require for such verifications, etc.
Testing will work for everyone. We typically do it for our pre-employment tests, how is that any different? Since you assume it won't work for everyone in welfare then how do you think it works for pre-employment purposes?
Again, on the cost thing: I do not know how much a drug test costs. But I believe I can pretty comfortably assume it would cost less than the help they are receiving. And I would imagine that there would be more than a "small number" who test positive, considering that everyone I know that is on them, besides myself and my family, sell them for drugs or do drugs on a constant basis.