Of all the sacrifices being made over the next few months, food waste is the least of anyone's concerns. It sounds like you have a dog in this race, what's your real concern?
My concern is that supermarkets are the highest risk location for infection during the lockdown. Spreading the load, and reducing the number of customer at the supermarket would be seen to be desirable for me.
Especially if the Requirement for Asain supermarkets to close (source: Melissa Lee) is true. Everybody who previously shopped at Tai Ping and the likes will now need to go to countdown and the likes.
Currently Supermarkets seem to be struggling as seem by the plee's to "shop normally" and item limits.
Ironically the item limits make it impossible for many to do their normal weekly shop, and as such will require more frequent shopping visits.
Further, the closure of the Hospo industry, butchers, bakers etc, will mean that many that frequently used those services will need to buy far more than "normal" at the supermarket to not go hungry. None of this is a problem if the supermarkets can handle the extra load.
Hopefully everything can calm down in the next couple of days, and item limits can be removed at supermarkets, hence allowing households to do weekly shops, reducing the number of people in the supermarkets.