I've always wondered - are repairs on high end cars (most similar-purpose components of which are largely available in less costly autos) high in part due to the fact that if the owners can afford to spend $150,000 on a (USED) car, they can and will afford to pay (brag) about the $500 oil change - turned service appointment?
A friend of mine had his Lexus RX in for service and (not surprisingly) found that the oil filter going onto the same engine on his car as goes into 'mundane' Camrys was effectively one in the same, but he of course was charged more for it. However, the lounge is much nicer, and the filter had an 'L' logo on it. Lexus' at least don't regularly break, tho.
I guess that differentiates the new money from old though - the really rich don't flaunt it - and got rich by not blowing thousands out the door on unjustifiable expenses or cars notoriously known for failures.
But as Chris pointed out, correctly, people want to know/show 'they have arrived'.
To each, their own.