Actually, it seems that you are the one who doesn't understand economics. It is all about supply and demand. The $24 fast food meals won't continue to cost $24 if people don't buy them just as cruises, that are now costing me more than double what I used to pay not long ago, would come down in price if people stop buying them.
Now, whether or not someone should be making $20 an hour to hand burgers across a counter is a whole different matter. AND, even at that pay rate they still have a tip jar on the counter.