Ya, great fucking policy...
You know, since clearly everyone who has used "drugs" is a horrible person who contributes nothing to society.
Apart from people like this...
http://coedmagazine.com/2009/02/06/the-10-most-successful-potheads-on-the-planet-cool-enough-to-admit-it/
Or Steve Jobs (taken from his wikipedia article)... "During this time, Jobs experimented with psychedelics, calling his LSD experiences "one of the two or three most important things [he had] done in [his] life". He has stated that people around him who did not share his countercultural roots could not fully relate to his thinking."
Or numerous other highly successful people who us drugs.
Lazy people are lazy, with or without drugs. Laws like this won't fix anything at all.