I don't know, but I sure would think twice about being involved in drug trafficking if the consequence was death. If most people think that way, then the access to drugs would be much lower.
I find it interesting that the author infers that Indonesia low drug (4% of population), compared to higher drug use in Europe and America, should preclude the from taking a tough stance to prevent drugs abuse from becoming an epidemic.
On the contrary, we should applaud Indonesia for having a system that keeps drug use at low levels.