Mike's rig might be a bit vulgar, but in a lot of it at least you can seen the value, the gear that obviously took a lot (was expensive to build). Sort of along the lines of custom cars or restorations, you can see where the money goes. So if you got it, I see no real problem spending it there.
Want to talk about things that rich folks spend money (collect) on? How about art, fortunes are spent on paintings, etc; that look like they could have been done by kindergarten kids with water colors. Or the Picasso stuff that looks like it was done on a bad (or good) acid trip. And because some freak somewhere see's some kind of inner vision in the artists mind, the dollar value of a few cents in supplies turns into a multi million dollar wall hanging. You look at stuff done by the Michelangelo's and anyone can see the talent, but so much in the art world makes the snake-oil peddling in audio look like a flea on a elephants ass in comparison.