Joel Achenbach has an article on class in the US in today's Washington Post. One thing toward the end of the article struck me. Someone is discussing current class lines: today, the rich have staff, a personal assistant or whatever.
I think it's true before WWII most upper middle class families had staff--i.e., maids/cooks. Electric appliances in the home, the spread of restaurants, and processed food reducing cooking time has had an impact. I wonder, is it easier to accept inequalities of income when there's no employer/employee relationship involved?