Even now in the US, moneyed interests don't necessarily get everything they want --- AT&T couldn't push through the T-mobile merger, to cite a much less controv

Even now in the US, moneyed interests don't necessarily get everything they want --- AT&T couldn't push through the T-mobile merger, to cite a much less controversial example. In this case, there would be money on both sides. The drug war itself is a massive industry at this point --- look at the power of prison guards in California. There are also a whole lot of politicians with a massive ego stake in the existing set of laws. And Monsanto, the tobacco companies, and agribusiness all have much easier and less stressful ways to preserve profits by lobbying. (Maintaining agricultural subsidies, for the first two, for starters.) So, don't expect this to happen really soon.