Seems to me that you're penalizing the people who jump through all the hoops, pay all the fees, follow all the rules, only to get charged more for their trouble. Terminal cancer patients who don't want to break the law, chronic pain patients that are disabled and have little money pay extra on the off chance that someone obtains things a little cheaper at a dispensary and then resells it? With all the regs in place as to amounts purchased per month, doctors' prescriptions and re-registration fees yearly, etc. etc., I don't see that as being much of a problem.