One way to solve this might be to institute some kind of cultural practice of largesse. That is, if it becomes disreputable to throw away food and a kind of hour of charity is created, that might help.
The devil is in the details, but this may be one way to go about it, even if not daily, even if not perfect.
There are cultures around the world where it is really, really bad to throw away food. People with extra food that won't be eaten as leftovers will offer it to less fortunate people who live or work in the neighborhood.
The devil is in the details, but this may be one way to go about it, even if not daily, even if not perfect.