The problem with that line of thought is that the really wealthy people are used to getting much more for their money than Disney is offering. Why stay at a Disney resort when you could stay at the Four Seasons and have an experience that dwarfs Disney's current offerings in every way?
And that's if those people are going to Disney at all. Just because they have plenty of money to spend doesn't mean they don't care about value -- in fact, they're often far more discerning about how they spend money than the people who can't really afford it.
I agree. It's honestly been puzzling to me that for a business that deals in volume WDW has got away with raising prices to such a premium level while visiting has become an increasingly unpleasant experience with greater crowds, shorter hours, fewer perks, etc. and a greater sense of being nickel and dimed at every turn.
Perhaps that's a testament to how well the economy has been doing, but it's likely there won't be so much cash floating around for a while to come. And, really, are those still flush with cash really fantasising about getting up months in advance to book their spaces in line for rides, jumping up at the crack of dawn every day to get a half an hour of manageable crowds in, etc? If I were so cash rich and time poor, that wouldn't be my choice.