I don't think that the people with money drive big cars like it used to be. You see few Escalades, Yukons, QX80s, etc on the street today. And the Hummer doesn't even exist anymore.Exactly.
The only difference these days is that not everyone and their mother is driving a big V8 tahoe, those days are long gone. Most are down to fuel efficient cars and the people making real money drive the big truck based vehicles that drink gas.
Perhaps only rich people drive the big truck based vehicles because they are the only ones who can afford it, but many rich people also drive efficient vehicles. I don't think the deciding factor is how much money you have is all I'm saying.