Re:I'm surprised white markets aren't more common (Score 1)

You assume that the offer will be constant but is not. Each farmer would have the possibility to plant opium or coca with a sure mark, do you think that all the farmers will be happy to plant anything else... in the long term, the farmer will loss because of the mono plantation, but that will be not the only problem, in short term the government will be broke for buyout the special plantations.

If you propose the enforcement of the control in the limits of the production (to assure the constant offer) you will generate what already are in Peru or Columbia or Bolivia (black mark), Here again with the same problem of the start.