Japan has a backwards view of mental health, and one of the highest suicide rates in the world.

Yet public places are immaculately clean.

The fact is that western people and law enforcement tolerate vandalism, littering and antisocial behaviour.

Recently, on Seattle's airport train, I saw a person openly taking garbage out of their bag and throwing it on the floor. No one said anything - just another day on the dirty train.

I don't think someone would dare do that in Japan or Singapore.