I didn't get what you meant with the McDonald's part
And I guess I didn't factor in the potential surge in drug use.
Federal excise taxes collected on alcohol in 2007 totaled around $9 billion; states collected around $5.5 billion. Taken together, this is less than 10 percent of the over $185 billion in alcohol-related costs from health care, lost productivity, and criminal justice. Tobacco also does not carry its economic weight when we tax it; each year we spend more than $200 billion on its social costs and collect only about $25 billion in taxes.
So I guess if we did legalise drugs, taxing them wouldn't make up for the social and health care costs if it is in anyway comparable to alcohol and tobacco. But, as it is, one would assume a lot of money is already being spent on drug related health care costs, so the only reason not to legalise drugs from an economic POV would be if the money saved + the money generated from tax revenue was less than the increase in health care costs if drugs were to be legalised.
http://www.economics.harvard.edu/faculty/miron/files/budget%202010%20Final.pdfThe report estimates that legalizing drugs would save roughly $48.7 billion per year in
government expenditure on enforcement of prohibition. $33.1 billion of this savings would
accrue to state and local governments, while $15.6 billion would accrue to the federal
government. Approximately $13.7 billion of the savings would results from legalization of
marijuana, $22.3 billion from legalization of cocaine and heroin, and $12.8 from legalization of
other drugs.
The report also estimates that drug legalization would yield tax revenue of $34.3 billion annually,
assuming legal drugs are taxed at rates comparable to those on alcohol and tobacco.
Approximately $6.4 billion of this revenue would result from legalization of marijuana, $23.9
billion from legalization of cocaine and heroin, and $4.0 billion from legalization of other drugs.
EDIT: I just realised that these figures^ pretty much came from the same guy I spoke about before, sorryI really can't find anything that gives me an estimate on the potential increase in health care costs if drugs were to be legalised, yet, but I'm looking into that now
But yeah, would the costs increase by 83 billion? I really have no idea
Also, they didn't factor in the amount of money that would be saved in regards to the prison system. The amount of time someone spends in rehab is much cheaper to facilitate than someone who spends the same amount of time in jail - you can find support for that easily online yourself, and I'm yet to find something that contradicts this.
Also, whether or not drug use would actually increase is another story, as
some past experiences have indicated that use would decrease. If this would be the case, then you would expect a decrease in health care costs. But at the same time, other situations have indicated an increase in use is likely - but whether or not that increase would equate to over 80 billion dollars in health care cost, I don't know.
Something else:
Legalising drugs would end the production of unclean and contaminated product. This in itself could increase safer use and decrease health related issues for any one individual, couldn't it? Decrease the spread of infection through dirty needles etc