Shrug, I learned a long time ago that the 'rich' people tend to be the least dressed up. They just don't care.
On a flight from Montego Bay to Miami my boyfriend and I were flying biz class. We were NOT dressed up and we are both young (I was wearing a jean skirt and tank top, he was in shorts and a polo) and GA told us they were boarding FC pax only. We didn't budge from line. He told us again, not what I would call nicely and I gave him my coldest look ever and mutely handed him my boarding document. He flushed red and ushered us on to plane.
Sigh...