A bad drug trip? On pot? Regardless, that's not the point of his argument, it's about hurting oneself and the cost to society because of it.
Plenty of that happening... as realbabelfish pointed out there are so many different types out there. Then again people spazz out on an alcoholic binge :/ They may have the take the day off to recover - so costing society again (not sure how though).
How does it cost society? Unless of course those people work on the public sector or are on benefits. A private company would stump up the cost, and besides, a lot of jobs can be done remotely from home if needs be.
The long term positives of exercises and rendering yourself healthier outweighs the minuscule chance of a work altering injury. So I can't really buy that argument I'm afraid. It makes you less of a cost long term on society as you reduce your chance of diabetes, obesity and other long term conditions, ergo spending less time in the NHS. The amount of people injuring themselves in a gym or going for run is insignificant. More people are knocked off their bikes cycling to work
All these things happen already :S so, considering that would you not rather the drugs they are using were clean? and the money they spent on it was going to the goverment?
I'd rather they weren;'t used at all than "clean" - and sure the crime aspect would be great - but as already discussed it's just not that easy - there are far too many long term effect, behavioural and psychological effects to be considered, as well as the ability to work, be a functioning member of society. There's a growing amount of obesity, and alcoholism in this country - so clearly as a society we are not able to apply any self control - what happens if we start putting more potent products out there.
I live in London, and I'm under no illusions that there are many dens where unfathomable things take place... heck I drive around London where I can smell weed being smoked in cars, let alone walking around Brixton with it being pushed on every street corner!! :/ So there is already a hugely relaxed view of drug taking in this country. This is not a good thing IMO.
Personally, what I feel will happen long term is a full circle. Society will carry on pushjing the boundaries, keep going into an ever decreasing circle, increased drug use, decriminalisation to legalisation through to banning again.
I know some drugs are fine, and some drugs if taken with care and moderation can enhance one's life - I'm not that ignorant. However, society as a whole is not mature enough to deal with this. It's just too much for it to deal with, and it will fall apart in my opinion.
I'm happy to be proved wrong an really wish I will be - but if I'm honest, I'd rather live in a slightly ignorant world, where I don't have to deal with drugs day to day, and not have to worry about protecting those around me from those that do.