That's right, it is OUR OWN mess, not because we put it there, but simply because we see it where we happen to be. Instead of bagging it up and taking it to the dump ourselves, we may call the city services who are the professionals to do this. And if they won't do it, the alternative is to add our own trash to it, and stop considering it ours the moment we walk away.

The Singapore solution sounds like it could work... until people get tired of being fined, and stop littering. Then the city won't have enough funding for bins, incentivizing people to leave their trash on the corner, even with the risk of fines. If sufficient people do it, the accumulated fines will pay for more bins, and the cycle starts again.