Why is entertainment so expensive???

I've got something stuck in my crawl that I just have to pull out. Recently Wicked tickets went on sale here in Cincinnati. Of course they sold out in a matter of hours and I didn't get mine, but my question is why is entertainment so expensive? I was looking on e-bay and actually found tickets to one of the shows here in town, and they are $700 and climbing. AM I THE ONLY PERSON WHO FINDS THIS APPALLINGLY??? We grow up in a society that pushes culture and arts and then charges us an arm and a leg for it. I had dreams of some girlfriends getting dressed up, having a nice dinner downtown, and seeing Wicked. Some dreams aren't meant to come true, unless of course one of these friends happens to be wealthy and generous. I am sad to say that although my friends are generous none are wealthy. Mental note--- get better friends, if not better friends, well at least wealthy friends. Susan, when Geoff hits the New York Times best seller list I better get Wicked tickets.
Now don't think that I am just picking on the arts, I am not singling them out. Sports and concerts fall also into this same category. It's nothing to drop $200 on a concert. I know I've seen me do it. I actually considered possibly buying Bengals tickets at $150 a pop. Don't even get me started on Notre Dame football tickets. For those, I would sell a kidney. Now I am really not a complex person, really I'm not. I just want to enjoy a football game, see my favorite artist perform, or catch a Broadway show without taking out a second mortgage on my home. IS THIS REALLY TOO MUCH TO ASK!!!!!