Yes, I think they're trying to make the best out of a bad situation and it can't be easy for them (the supermarkets). They probably don't know all the ins and outs of what cards people have. They've had this thrust upon them and they probably know that a lot of ordinary people are trying to bypass the shortages by ordering online and they wouldn't quite know what to do about it. If they stopped for an hour during the day (or even half an hour) to only serve older and disabled people they'd inconvenience a lot of ordinary people who are only able to shop at certain times.