Marketing is all pervasive. They're getting marketed products they can't afford - can't ever hope to acquire. They believe the only way they're ever going to achieve happiness is the acquisition of these products. Products they can't afford. They see people living that lifestyle, and they have that lifestyle beamed incessantly into their minds through media, which you know I participate in.
Illustrators are usually illustrating something big or commercial if not outright advertising. It's a form of prostitution, but that's cool because we don't have any moral hang-up about it.