The weed not being addictive thing has pretty much been debunked....people can be addicted. Anecdotally, I know more people that NEED weed than alcohol. The difference is that it doesn't affect their lives and personal relationships as much. Why? So their insurance premiums can skyrocket? Can you imagine someone driving a forklift with weed in their system? Obese individuals hurt business profitability and rob from their coworkers by raising premiums. Same for smokers, since it costs 5-6 times more to insure a smoker. A huge amount of workers could put themselves and their employers at greater risk, hence why drug testing is required. As a teacher, if I'm suspected of being intoxicated or under the influence, I will be terminated on the spot and my union won't defend me. This goes for most types of jobs in the US. Can you imagine someone being drunk on the job and driving a fork lift? Oh the humanity. What happens with insurance premiums with those huge risks? This idea that "If we don't test for weed, everyone can just smoke pot at work" is a ridiculous strawman.