Some of the comments are assuming that all those who smoke pot are irresponsible or unable to do a job if they do smoke pot (this includes people who may only smoke at weekends/parties btw)
We don't regulate alcohol use, and it's quite a lot more destructive for some. I don't get the specific puritanism for pot. Edit: Regulate as in drug testing for past use in an employment context, like what the story is talking about.
Yes we do. And it's a cash cow for the government so we're unlikely to stop anytime soon.