The war on drugs is a failure because it's a psy-op!
The politicians are patsy's doing the bidding of their controllers. The real controllers of our paradigm (banking entities and elite families) are in a battle to control drug production and distribution for their own nefarious ends. The CIA have been huge drug runners since the Vietnam war and are currently still at it all over the world under the umbrella of the Bush crime family and other scumbags. Why are the US still in Afghanistan? Why did they go in the first place? The pretext for war was bullshit.
https://www.globalresearch.ca/drug-war-american-troops-are-protecting-afghan-opium-u-s-occupation-leads-to-all-time-high-heroin-production/5358053
The British have been at it for centuries too. We decimated China's trade when they tried to stop British Government drug trade.
http://nationalinterest.org/blog/the-buzz/the-opium-wars-the-bloody-conflicts-destroyed-imperial-china-17212
The big banks get slapped on the wrist for drug money laundering and cartel leaders are taken out to this day so their businesses can be controlled and profited from.
It's a farce!