However, I recall about 20 or 30 years ago, the cleanliness was much better, probably while Lee Kwan Yew was still in charge. I would see businessmen in suits stop and pick up cigarette butts in the street and bin them.
But in more recent visits, I notice locals walking past litter and butts more casually. It is still better than most cities, but I think the fastidiousness has worn off a little with the latest generation?