Why do people with money always look like it?

Can't believe I forgot one of my Buffy-related sightings from a few months ago. I was hanging out in the Casbah Cafe in Silverlake, and Emma Caulfield was there hanging out with a friend, dressed very simply, but looking quite good (and quite tiny). Why is money always most evident in people dressed in jeans, flipflops and a ponytail? Sigh.