They can raise prices moderately on everything to make up for it, and/or stock things that are slightly less appealing in normal times to slow turnover and bias sales towards those more in need. For instance, the pasta section was about 5% full and almost entirely things like whole wheat, cauliflower gluten-free, or turmeric. But that's fine with me. Your tone is that this is not the optimal solution and some misguided people are causing it by mistake. I don't think that's the case.
People who get upset about the lack of high prices for scarce commodities seem to me to be inconsistent - if you aren't in a high stakes zero-sum competition, then why should you care much about being able to outbid others? And if you think that you are, how can you ethically defend everyone not getting a minimum ration or be sure that in a so-called free market you will get yours?
People who get upset about the lack of high prices for scarce commodities seem to me to be inconsistent - if you aren't in a high stakes zero-sum competition, then why should you care much about being able to outbid others? And if you think that you are, how can you ethically defend everyone not getting a minimum ration or be sure that in a so-called free market you will get yours?