That is not fair. He was just making a point that if they made software more affordable than more people would buy it. Which is probably true. It is just finding the right balance so both the consumer and developer feel they are getting a fair trade.
Didn't know there were so many economists on this board.
Whenever anybody sells any product or service they must find the right price. There is a sweet spot that every producer/seller should try and find to maximize profits. Price the product too high and you won't get as many sales, price it too low and you missing out on $$. This applies to everything in a capitalistic society, not just the app store.
You get many young people reading and posting comments simply saying price it lower and you will sell more. The key job of the developer is to know his/her market (and competition) and most accurately determine where the price should be set. Choosing the right price is often what leads to the success or failure of a product or entire business.