Interesting idea… Is human morality (in situations where no punishment exists) a result of the societies we live in and our societal expectations, our upbringing, or is there some inherent morality (guilt from doing something bad, or satisfaction from doing the right thing) within most people?
Whilst I do live somewhere that has trolleys with coins, sometimes you get one that is damaged and doesn’t require a coin. Yet I still return those ones, because why wouldn’t I? It only takes a minute.