Ever heard of Jevon's paradox? It says: efficiency in industry leads to more production, lower prices and to higher consumption. And finally to overproduction and overconsumption. That is where we are in now.
Supermarkets contribute to overconsumption by loading the shelves again and again, also at the end of the day. By tempting consumers with psychologically clever arranging the shelves. This way the footprints of people in rich countries become bigger and bigger.