We do need to change behaviours on what is the new norms should our food security and usage. I recently read "The Power of Habit" by Charles Duhigg. Here he gave an example of how the slightest of changes to habits can change an entire planet's behaviour. Take brushing your teeth every night for instance.
There is another idea I wish to put forward. (Probably jumping the gun here) We often go out to eat and bring home leftovers which we forget about. How about an inventory app on your phone to track the left overs you bring home from a restaurant? You can sync it to a device on your refrigerator once you get home.
In other words, I have found from experience that in households with many people, food gets added and eaten without everyone knowing. An easy way to keep inventory and to show fridge contents may assist in alleviating food wastage.
A true possibility to buy bulk and share it out as needed. I did mention on another thread that there are factors to account for between people: - eating preferences - allergies - responsibility and delegation
That said, I would suggest pitching this idea to family, friends and work colleagues. Basically, people you will encounter on a (fairly) fixed interval.
Who knows, there may even be an app for you to state the food you require and it will match you up with people aiming to shop for the same thing.
I would also ask what is the percentage of avoidable vs unavoidable and semi-avoidable food waste.
Great job categorizing the types of food wastes we can have. I believe not one solution will solve all waste. At least, now that there are categories, we can tackle each problem in a more focused manner.