Why are eBooks so ridonkulously priced?

Riddle me this: Why is it that I can get a full download of the Tron: Legacy soundtrack (or virtually ANY other album) from Amazon for $4.99 (or $7.99), or I can buy the physical CD for $11.88; but if I want a damned eBook, I am paying as much or MORE than I would pay for the paperback? And don't give me that "cheaper than hardback" nonsense, because I don't subscribe to that newsletter. The publisher still makes money on paperbacks, so does the author. Otherwise they wouldn't reissue them every couple of years with different cover art at the current paperback market price.

If the book isn't available in paperback form yet, I understand the price discrepancy. But if it is available in paperback, then change the ebook price accordingly. I mean honestly, if I buy the book I should get a free ebook copy with it. Hell, I'd even pay $12.99 for the paperback in that instance if necessary.

Here's why I'm ranting: I spent $9.99 on a book that came out 2 years ago, I've since purchased a Nook and I'm going on a business trip that I'd like to reread the aforementioned novel. But now if I want an ebook copy of it, it's another $8.99. That's horseshit. If I have already purchased it, I should get some sort of a discount. Yeah, I know that's not how it works in retail: "Oh, but I already bought one vacuum, I'd like a second at half price." But we aren't talking vacuums. We're talking about a book. A book whose content hasn't changed, mind you. And it isn't like they're LOSING money by including a copy of the ebook. I mean look at DVDs and BluRays now; if you buy one, most of them have a code for a free digital copy so you can take it with you. Yes, you pay more for them up front, but you get more out of them in the long run so it's worth it. Like I said, I'll pay more initially for a book if you give me multiple ways to enjoy it.

Bah!