There's a lot of aggression on here isn't there – I can't see the issue to be honest. If you've got that sort of money to spend on a bike, you've probably also got the £100k+ to spend on the car and the £1m+ to spend on a house. In the scheme of things its nothing. My LBS is building a Storck road bike for someone at the moment thats pushing £15k. Bloke owns a manufacturing company thats clearly doing very well, he likes pushbikes and has a lot of disposable income. Why shouldn't he buy the bike he wants.
Then there's the racers. How many hours a week does Njee20 put into training, plus the cost of the nutrition side of things, coaches and so on. You spend that amount of money, surely you'd want to ensure your bike isn't holding you back. And if I'm right, Njee is a senior? So say there's 40 seniors, and a similar amount of Elite racers. All of which want the very best bike available. The cost of this is nothing compared to motorcycle racing so in relative terms its not that bad. I went to a national cyclo-x event last year and a bloke there (not Elite I might add) had 3 of those Scott CX bikes, all identical spec (Sram Red, Zipp wheels) and a boot full of spare (carbon) wheels. There must have been £20k worth of kit there at least.
At the end of the day some people can afford it. For everyone else, there's On-One….