One idea which I think could help is that supermarkets restrict supplies for customer’s based on their regular orders.
Most supermarkets (at least here in the UK) have shopper schemes where each shop is connected to a customer’s membership by way of them scanning their ‘points card’ with each shop. This means supermarkets know what a regular shop consists of per customer, which means they could restrict items sold on a weekly basis to reflect that. Could this prevent over-shopping/panic buying?
Makes you wonder why something like this wasn’t in place to begin with…