The downside to legalisation
Use will rise, although possibly not amongst the majority of existing users. How many teens would feel smoking weed is rebellious when they find out half their teachers skin up at lunch time?*
Health services would have to cope with the increase in people who cannot control their (now legalised) use. This might be offset by some of the patients already being treated for addiction to legal drugs.
Companies which test for drugs would have fewer grounds to fire staff (it's not illegal) meaning they would have to confront the real reason they want to fire someone because they are incompetent and would now have to *prove* them so.
Education services would have to spend more time explaining what these drugs are, dosage and effects rather than the 5 minutes of "Just say no".
The FDA (or the better business bureau) would have to expand to crack down on sub standard suppliers. 5% by weight now *means* 5% by weight (and no rat poison)
Substantial numbers of law enforcement staff would have to be re-assigned or made redundant. Severance packages for the whole of the DEA would probably be *billions*.
The IRS would have to expand inspect the many newly legitimised suppliers. Note with supply legal overheads and sale price should drop *substantially* ,meaning expected tax revenue would be lower than based on the current street prices.
Suppliers would have to stop being gangsters and start paying taxes and salaries as a proper business.
Commodities markets would have to expand to support and report these new raw and finished materials.
New groups of farmers could apply for federal aid following droughts or flood damage.
Governments would have to admit they had p*££ed away *trillions* of dollars of taxpayers money over *decades* rather than show leadership and confront the public's schizophrenic attitude to the problem that the human brain responds to a *huge* range of mood altering compounds, in some cases (like *legal* drugs) very badly.
All told a nightmare scenario for any right (and extremely right) thinking politicians.
*I have no personal knowledge of any currently employed teacher smoking dope at any school.