Yes, Singapore is an example of what actually works. Every once in a while Singapore will execute a drug smuggler. And then the Pope and other worthies will cry and whine and complain.
Funny how we don’t hear from them when some poor kid overdoses and dies alone in a gutter.
A shopkeeper chatted me up when he found I had a hour or so to kill before catching my flight home. Very interesting conversation. He told me back then (late 1990s) that 2 or 3 drug traffickers were hanged just about every week at Changi prison near the airport. He asked me to compare that to the number of drug related deaths in a comparable sized city in the United States, which, as we both knew, was 50 to 100 times that number.
That's quite efficient in saving lives even though Singapore still has a few addict related deaths even with such draconian laws.