I personally don't think Disney is expensive.
A broadway play is about the same cost as a one day ticket but meanwhile you only get 3 hours of entertainment at a Broadway play. Food prices are on-par with any type of tourist attraction / sporting event in the country. A day pass at Disney can get me 12+ hours of entertainment.
Disney World is one of the top tourist destinations in the world. I don't know what people expect. ~$100 a day (plus the cost of food) is a pretty good deal.
This is how we feel. Prices are up everywhere. Concert venues and sporting events have higher prices for worse food, and you don't even have the option to bring in your own like Disney allows. Photo packages at Merlin Entertainment venues are almost as much as a one day photo pass for only 3 different poses plus a book. Parking is easily $20+ at city attractions (pick a city any city), and it's getting harder to find hotels with free parking. We just stayed at a state park and we had to reserve our cabin 11 months in advance (to the minute) - as comparison to having to make reservations and fast pass selections in advance. If you want to be entertained you have to pay money and stand in line.