I don’t have a problem with billionaires being billionaires, although I think they should be taxed in a way that makes them somewhat less rich billionaires and I don’t think they should be able to pass the lion’s share of their fortunes on to their children because that’s how you get an talentless aristocracy.
But I do have a problem with billionaires serving in Congress. Members of Congress represent somewhere between hundreds of thousands to millions of people, and only a handful of them are billionaires. I will vote against a billionaire in a primary for no other reason than that they are a billionaire.