As to your first point. Yes. Everyone does deserve a vacation. Be it Disney or on a beach in Hawaii. If you want to mimic Joseph Stalin, go live there. People finance houses, finance cars, finance a college education, a wedding, a batmitvah, etc...and yes, believe it or not they finance vacations. Because of the fact that someone finances something does not mean they are morally or financially bankrupt. ...to suggest so, is ignorant.
Should someone living within the circumstances you present, spend $5,000 on a luxury vacation at Disney? Probably not. But there are economical ways to go on vacation. Believe it or not, there are people who pay their credit card debt off in full every month and do not pay interest and carry no balance. There are many others who pay it off over the course of a few months and are financially responsible.
Guess why I pay monthly payments on my AP pass? #1 there is no interest. #2 the website doesn't take cash. Why pay $800 at one pop, if I'm not being charged interest on the purchase and don't need to do so. You may want to be parted with your money quickly...I don't. And I end up paying the same amount as you do. You just give them your money quicker, which I would argue leaves you with less to invest or make interest off. Your way to me seems financially irresponsible.