My hunch is dumpster diving works well when food is plentiful and people are throwing perfectly edible items away willy-nilly.
Get a depression-style food shortage and suddenly what you find in the dumpster won’t be as appetizing as the donuts that Dunkin just didn’t sell that day.
Get a depression-style food shortage and suddenly what you find in the dumpster won’t be as appetizing as the donuts that Dunkin just didn’t sell that day.