This helps to a point, but people only have so much time and can only do so much if the system is systemically broken as it is in Rome, where they are simply not able to process trash even when placed in dumpsters. Plus if the trash contains lots of things like broken glass or sharps, it might be dangerous for untrained citizens to dispose of trash on the street.

America hasn’t really made a dent in domestic poverty even though charitable donations are the highest in the world per capita. At some point you do need an organized government response to problems.