Earlier quoted context omitted.
I'm not sure "opportunity cost" is the correct term for what the OP wanted to say, since it usually refers to the (theoretical) loss incurred by choosing one alternative over another. The point is simply that a consumer's ability to pay is not necessarily a reflection of their need of the product. That's not an argument to blithely decouple pricing from supply and demand, but it's a recognition of a problem that a ma…
Opportunity cost is everything you choose to forgo when you choose to allocate any resources to anything. If supply and demand is allowed to have its normal influence on price, then you can decide what you actually have the most demand for, and allocate your resources accordingly. The decisions you make regarding your own needs are always going to be much more efficient than those that any rationing authority could e…
(2) As I often see when people make the case you're making, you are making unwarranted assumptions about the rationality of buyers. If people are fleeing a hurricane and the gas station raises the price sharply because of the demand, what can happen (and we've seen it happen, in fact) is that it encourages hoarding: it is now a precious commodity and those who can afford to buy it do so, denying it to others.
(3) As I also often see when people make the case you're making, you're also inserting a Big Bad Government Guy into the scenario, your "rationing authority," which people making my case aren't necessarily suggesting at all: we're suggesting that it is rational for suppliers to choose to ration goods in order to be able to meet the demand of a greater number of customers, rather than to meet only the demand of shoppers who can buy as much of [thing in short supply] as possible. Again this is what we actually see in practice, at this very moment: stores in my local area limiting the number of certain items you're able to buy at one time are not doing so because they have been ordered by the California Politburo to do so, they are doing so because on balance they can serve a greater number of customers, rather than turning away literally thousands of desperate people who couldn't "allocate their resources" as well as the guy with five Ultra Transparent Titanium Master Cards.