Prices increase every year. Disney has the right to jack up the price even more due to the economy, but unless they are providing a greater service it may keep even more people home.
They could never do away with the Park Hopper aspect. It may stop being an option and be included on all tickets but they can't eradicate it. Imagine if you couldn't hop parks and on any given Saturday 75% of everyone staying at a resort, and every local visiting for the day, all decided to go to MK? They couldn't be turned away because they wouldn't have Park Hoppers, so then what happens?
If Disney restructures its pricing and either includes all features to make it seem like a greater value, or else, splits everything up and prices things individually, they could increase pricing and few would know or complain.