First couple I've found were all behind paywalls :( I didn't really mean to start a full argument.
Although this article (from a guy who is not in favor of price gouging, actually) looks like a good read on the points from the different side of the debate http://www.masterresource.org/2012/12/price-gouging-research-areas/
I agree it isn't fair to the poor. But that raises an interesting ethical problem, doesn't it? If our responsibility is to the people at a whole, should we care more that more people are helped? Or that the help is more evenly distributed?
Personally, I doubt that any price gouging is going to *reduce* the overall availability of necessities (as people who are charitably minded will be loading up their trucks, too), so changing the initial availability from "whoever gets to the gas station first" to "whoever gets to the gas station with $10 in their pocket" doesn't seem like such a price to pay, especially since what will really bring prices down in the long term is increased overall supply.
That said, I do think that the people doing it are huge dicks.