Except that isn't how real-world operations...uh, operate. The people running the events I was referring to (mainly concerts and music or film festivals) don't think, "My venue can hold 5000 people, but 20000 want to come, so I'll keep raising the price until only the richest 5000 fans can afford a ticket." They figure out how much they need to charge to cover operating costs plus an acceptable profit, and split that 5000 ways; and thus is the price set.
What's you're missing when you say "merely transferring costs" is that all 20,000 feel they had a fair chance at getting a ticket, and by giving them the opportunity to substitute time for money, you ensure that you get a more-devoted, more fun, and just all-around better audience (a subset of the group that can afford to pay the price, as determined above, of course). It's not "merely" anything, as right off the bat you avoid the kind of resentment you see in this thread re: Magic cards*.
The shortage doesn't exist because the price is set too low, the shortage exists because demand outstrips supply. The question is, what is the best way to allocate scarce resources? Basing this on "ability to pay more" (essentially, a bidding war) is one way to do that, yes, but it's not the only way, and not always the best way for all possible resources.
*As I said before, though, this doesn't apply to Magic cards, for a host of reasons.

