IMHO places like Disneyland getting very expensive is actually a sign of the large number, and growing, of well-off people.

These places are one of a kind with extremely constrained supply-side while demand is huge so prices are relatively high to very high depending on the level of access/Hotel you choose.

I am not convinced either that a trip to Disneyland with hotel stay was ever within reach of everyone, especially without a level of planning and saving for it.

For many people who go there I suspect this is a once in a lifetime or once in a generation experience.