Save lots and lots of money by legalising drugs. Take out the crime, the naughtiness, the "glamour" associated with illegal drug use by making users buy them at Boots along with their suntan lotion and toothpaste.
Why does this idea matter?
If we accept that most crime these days seems to be drug-related, whether it is young men being stabbed to death for being members of the wrong gang, children being killed by dangerous "weapon" dogs or our houses being burgled and our cars being broken into, we could legalise all drugs if anyone had the courage to do it.
The police would save, the NHS would save, society would save by being both safer and healthier.
We have to bite the bullet one day and do it as we certainly aren't winning the battle against drug use. We have being trying for a long time and nothing has worked and never will.