Marijuana and capitalism

I see that tonight's Foreign Correspondent is about how business is rubbing its hands with glee at the prospect of a legal marijuana market in much of the United States.  An article along similar lines from the US can be read here.

This does strike me as a very serious issue.  As that second article notes, there's little doubt that tobacco use in the 20th century took off as a result of both a more convenient product pushed along by the profit motive.

The inadequacies of an under regulated market with regards to marijuana in Colorado have already been displayed by the stupidity of selling things like candy bars full of multiple "doses" of THC, with next to no labelling of the danger of consuming too much too quickly.  Talk about your obvious danger with no care taken by the profit maker.

Now, I guess some may argue that, like alcohol, where profit pushes sales, marijuana with find its natural level of societal use.

But the legalisation advocates like to argue that the ubiquity of its use is one of the reasons for legalising it.   Hence you could argue that there is already is a "natural level" of use in society, and what you see by legalisation is permission to give capitalism its full force behind manipulating a market to increase it:  to redefine a new "natural level".   The example of tobacco shows, of course, that capitalism left alone can  take scant account of the interests of public health and productivity. 

I suppose you could argue that the State, if in future concerned about the increase in use, could seek to drive it down by increasing taxes, as they do with smoking and alcohol.   But the higher the taxes, the less likely you will ever actually remove the black market for the drug, which in this case is even easier to manufacture than either tobacco or alcohol. 

I therefore think there is every reason to be leery of legalisation because capitalism and its role in promoting markets makes for an uncomfortable mix when it comes to a "new" product it is not actually in our societal interest to see becoming too popular.