It's almost cliche now to say: if they really cared they could whip the market out from under the drug gangs instantly by legalising the drugs. If I was cynical I might think they had some sort of financial interest (like in the tax havens or the city - the drug money-laundering capital of the world) - that's on top of the usual advantage of setting some pensioners (the boring ones) against some younger people (or the working class coke users against the middle class ones).