What keeps Graceland in business?

When I was in high school, I worked at McDonald's for a number of years. I assure you, that job was misery incarnate. Hey hey though nothing provides motivation to move on like misery, though. And I've got some great memories. One of my favorites was the time an entire tour bus of Elvis impersonators from Canada stopped in for lunch on their way to Graceland. Most of them appeared but a comedic charicature of Elvis at best, but they were having a great time and were a fun bunch of people.
I just finished Chuck Klosterman's Killing Yourself to Live, a delightfully postmodern book who's thesis asks why "the greatest career move any musician can make is to stop breathing." Through the course of the book, he tells his story of experiences visiting various musicians' places of untimely demise. His work is peppered with interesting pop culture factoids, anecdotes, and queries. One that stuck out to me:
"the main thing I dislike about Elvis Presley is the idea of Elvis Presley, and that idea is what keeps Graceland in business. Its the religiosity of garbage culture; it validates the import of tabloid aesthetics, and it makes our society look stupid... For some reason, there is a stunning number of Americans who desperately want celebrity royalty and cultural dogma, and that's all Graceland is. Oh... and karaoke. There was also some karaoke."

Well, evidently it's not just Americans, but Canadians, too. I'm pretty sure the British are the same as well- perhaps it's Western culture as a whole.