One reason why it's been happening is that official inflation statistic are fake. If you want to learn more, check out
this. According to more honest price inflation calculations I think that the $48 should have risen to somewhere pretty close to what the price is today. But it is NOT OK as I will try to explain ...
Inflation is caused by an increase in the money supply. Once upon a time it was done by debasing coins, then by printing paper money, but nowadays by creating credit out of thin air in a complicated dance initiated by and for the benefit of government and big banks working in cahoots (c.f. The Creature from Jekyll Island).
Please stay with me, I will get back to theme parks shortly ... the new money does not circulate freely and and equally throughout the economy. It sticks to some people's fingers but it evades or slips through other people's. Prices of many things go up and up, but ordinary people's wages do not go up nearly as fast.
To put it simply, there is a spigot that is spraying new money into the economy out of thin air. Those located closest to the spigot (and who in fact built and operate the spigot) benefit most. That would be national governments (or supra-national governments in Europe) and large banks. Next come the very large corporations and state/provincial governments who are most able to influence and get favors (massive low-interest credit) from the spigot-masters. Those located farthest from the spigot (ordinary working stiffs, children, students, retirees) get conned. They get eroded purchasing power, eroded savings, high taxes and lots of debt.
Furthermore, rampant inflation erodes the worth and value of solid, chunky investments that SHOULD be steady earners due to their obvious perceived value (such as great theme park rides) and tends to favor more ethereal, speculative and slipshod investments (such as timeshare condos built and bought on credit).
That is why people are shocked and appalled at the price increases at WDW and also why, considering the price increases, not very much in the form of solid entertainment has been built recently. It's also why park maintenance and employee morale have (according to some) been slipping.
I can't explain why attendance keeps going up at WDW, but I'm pretty sure it's not because the average guest is more prosperous than they were a few years ago. Possibly people are substituting a Disney vacation for some other more expensive form of holiday. Some of them are enjoying vacations on credit, such as by borrowing money to buy a DVC timeshare. Many of them are foreigners who may be having flings at WDW as a way of getting money out of their own economically godforsaken heck-hole of a country and enjoy some of it abroad.
One big factor related to inflation is that only idiots save money, because inflation based on a credit bubble means low interest rates on investments, generally lower than (actual) inflation. People are more likely to spend $10k on a family vacation therefore than to save it for their kids' university. Thanks to the credit bubble they can borrow what they need for university anyways!