[Edit] To clarify, they seem to be "artificial" price hikes because they don't in any way necessary to cover costs. People realize they can charge more and get more money, so they simply do. That's inherently avaricious and unethical. Sure, maybe prices work themselves out, so that price goes down when supply goes up, but this seems to only be because suppliers can no longer get away with a higher price, because their competition is now selling it at a lower price. So I think it's far more ethical for a government to limit those kind of price hikes, which mainly just hurt the consumer, than to allow these abuses to continue in the name of "freedom".