It leans heavy toward being cultural: Japan got rid of most public trashcans after an extremist group attacked civilians with sarin gas, some decades ago. The streets remained as trash-free as usual. On the other hand after work, at night, you may see a manager passed out with a pool of puke in a subway car… on the other hand it gets cleaned up pronto at the terminus and the car will be clean and his wallet won't go mysteriously missing.