You bring up a good point, Nodda... they have cleaned up and are sober when they perform these days. On the other hand, in a lot of cases the damage is done; to wit: Brian Johnson, Ozzy Osbourne, and Joe Walsh (I don't actually know if Joe's cleaned up or not

). AC/DC's last decent album was "Who Made Who" and even then it was becoming evident his voice was essentially shot. I've seen Metallica on several tours, and enjoyed every performance. Would I pay to see them now? No, for a few reasons: A) Their catalog has absolutely sucked since their eponymous ("Black") album, B) They don't have the hungry, youthful enthusiasm they once had, and C) James Hetfield has apparently taken voice lessons that completely destroyed the raw edge of his vocals that were a big part of what originally drew me to the band. The experience of others at more-recent concerts appears to have borne out my reasoning.
You know I respect your opinion, but let's consider one thing: virtually all of the money from a CD (which costs less than 50 cents to produce as a product including master tooling) goes into someone's pocket. Cassettes cost over six times as much to produce (multiple parts, tape has to be wound, and it has to be assembled whereas a CD is just printed), and yet they were several dollars cheaper. Perhaps if the music industry--and I don't mean the artists--wasn't so greedy it wouldn't have buried itself. Back when I first switched to CDs, which would have been when I bought my '73 Charger 340 in '91, CDs were around $14-$15 each, cassettes were still $8-$10. I understand that technology costs money, but it's not like the music industry had anything to do with the development of the CD... in fact, they've never had a hand in the development of any recording technology, be it Edison's original phonograph, LPs, 8-tracks, etc. The record companies screwed themselves in the same manner as the UAW, and yet we're supposed to feel badly for them? I think not... had a larger percentage gone to the actual artists and the record companies simply taken a reasonable margin on their product, CDs would cost what--$5-$7? If I dropped $8 on a CD and only liked a couple of songs, I'd feel a lot better than when I pay $17.
Sign an artist to a 1-record deal, period. The music should sell itself. They shouldn't have to spend 6 or 7 digits to promote an album. If it's not a success, don't re-sign. Period. The tour should pay for itself, and the tour shouldn't result in huge profits for the label. They ought to be happy with the profits from increased record sales. I know, that's not how it works. Instead, they sign someone flamboyant with little or no talent, like Lady GaGa, Nickelback or RuPaul, then spend millions of dollars to convince us that's good music when at heart we know it's not. Yes, I like one Nickelback song... even a blind squirrel eventually finds a nut. In my opinion, their own practices have turned the North American public against the RIAA because of leaks about how little the actual workers actually profit from their work.
The ultimate bitch of it is that you're absolutely right: downloading hurts the artist, the roadies, the folks that set the stage and the sound, and those whom own the venue. However, it's because the record companies are going to increase their profit margins to make the same profit they always did. And they're going to do it at the cost of the "little people", including those whom made the music in the first place! So, I expect that The Eagles approached whomever and asked, "How much do you have to make?" After they got their answer, they decided they were going to make X percentage as well, and the ticket prices reflect that. If they can sell tickets at that high a price, it's a testament to their legacy and they'll do it again in a couple more years--one more "last tour" to refill the coffers.
Personally, I won't pay $100 for two hours' entertainment. I can spend less in a casino over twice that time and enjoy myself more, and I don't consider myself a gambler. If I'm going to spend that kind of money, I want something tangible rather than just a memory of what may or may not be an awe-inspiring performance.