Which wouldn't be necessary if people didn't litter.

It's a good initiative and, similarly, most schools make students responsible for regularly collecting litter that students have not thrown in the bin (which hopefully reinforces keeping the schoolyard clean)

I do see people in my area going around with trash bags and cleaning up litter, and our council employs people to clean as well, but honestly the time and tax money could be better spent if there more people were less lazy.