I don't know that that's true -- iTunes has had 99 cent songs since its inception, and even with the record companies crying and whining the whole time, it's been an amazing success. But prices go up eventually, no matter what product you're talking about, and if Apple had to raise prices, they could do a lot worse than adding a tier above and a tier below. Of course the record companies will want to put anything that sells on the top tier, but I don't think they can use that as evidence that consumers don't care what price they pay for music.
And let's keep in mind that at $1.29 a song, a 10-song album at $12.99 is still cheaper than the $16 and $17 record companies used to try and charge. There's no question about it -- this latest change is one in favor of the record companies, but a system like iTunes still seems worlds better for consumers than the old Sam Goody/Tower Records retail store system.