If airlines didn't receive revenues in optional add-ons, they would have to raise their base fare, which would be mandatory for all passengers, so again, it's all about choice. We want to offer the lowest price to those who care about the lowest price, and we offer a higher service set at a higher price for those who can afford it, and that's the right thing to do.
You want those people who are ready and willing to pay more to subsidize those who can afford the least. By the way, that's exactly what you do in your tax system. You tax those who can afford it more than those who cannot afford it. That's the right thing to do, and that's exactly what we are doing as an airline.