This is why Singapore is the safest country in the world. You can leave your laptop overnight on a bench and pick it up tomorrow. The death penalty for drugs is a worthy sacrifice considering the extremely positive societal outcome.
Rich people or not, it doesn't matter. Both rich and poor abuse drugs. Following this logic US would be the poorest country with 1% ultra rich utopian-like people as well.
Also cannabis is a legal drug in only 10 countries worldwide. It's not universally approved and won't be any time soon.