Singapore is a multi-culturial society and it is also known to be very safe and clean like Japan. You can definitely make people behave with top down rules, and eventually it just becomes 'culture'.

Maybe people just want to prevent getting arrested for a crime.

Seems like the hardly arrest the innocent, even if they didn’t do it

https://www.hrw.org/news/2024/11/04/inquiry-needed-japans-fl...