There are so many ramifications, specially with what happens in terms on the national relationships once the money flow is cut to some with drugs being made legal. We don't know how bad things could get for Mexico, and which strings are being pulled when the wrong people being left out of the money. There's also the people. It's easy to think a narc will become a happy member of society and do the nice drugs business once it's legal and stay there in a bubble. You're talking about people knowingly poisoning others and murdering by the hundred. Legalizing the substance won't make those people ethical well behaved persons caring for society. With truckloads of capital to move to other industries, imagine if the doors are fully open for top cartel people to move freely and move to rule the food, communications, or health industries. They're not the kind of people who would rather loose money to stop producing a bad batch of food that poisons people or avoid making people sick to increase profits.They can easily threaten a government inspector, wipe whoever gets in their way since they already do that, plus they have many of the law enforcers in their payroll. It's not like making new law will stop them from doing things their way. If legalization is the solution, at least first their economy and power can't be big enough so that they won't wreck other hubs in the country. So far seems like a fight to make cartels as small as possible to be controllable.