No, do the same thing that wiped out the prohibition liquor gangs - legalize and take away the billions in illegal profits.
Prohibition is always going to be an absolute failure as long as privacy exists. They couldn't stop entire truckloads of liquor. Today, the same profit can be made by smuggling a package that fits into a spare tire, airbag or someones stomach. A 12 year old can grow plants that are easier to grow than tomatoes and worth MORE THAN THEIR WEIGHT IN $20 BILLS! No police actions can stop something like that.
There is NOT A SINGLE person out there that doesn't do drugs or can't get drugs because of prohibition. It's a joke. When I go out to nice clubs/bars in NYC, well-dressed dealers give me their cards constantly. You can get drugs delivered faster than a pizza in this city. There is so much money that the cops protect many of them.
Even making drugs equal to murder wont stop it. In Iran, possession is a guaranteed prison sentence, they publicly execute 400+ drug traffickers every year and they still have a high addiction rate. In North Korea, possession is an automatic life sentence in the gulags and they still have a huge drug problem.
The only benefit from prohibition is lots of money for certain people and NOTHING else. Just ask any dealer if they want it legalized. Every single one will say NO and explain how much easy money prohibition puts in their pocket. The big ones aren't afraid of police because they “own” them.
Also, because of insane, unconstitutional, possession laws we have countless incidents like this. This cop got a deal to keep a lid on the drug corruption at the NYPD. The judge called this 'not only reprehensible abuse of trust and authority but the corruption of the entire criminal justice system.' http://www.dailymail.co.uk/news/article-2095772/Cowboy-cop-Jason-Arbeeny-planted-crack-couples-car-seat-escapes-jail.html?ITO=1490
You may have a point here, time to end privacy! We can finally do away with the evil scourge of drugs! Oh, waitaminute. They can't even keep drugs out of prisons. Guess we'll have to try something else.
If they can't keep drugs out of prisons, where they have absolute authority and control over people, how the hell do they think they can do anything about drugs in society at large? The simple answer, of course, is that they have no desire whatsoever to actually do anything about drugs (even if they could, which they can't for reasons stated in your post). It is far too lucrative in the power that it gives government and the revenue it generates in certain quarters, not to mention all the goodies that get funded by the 'war on drugs' industry.