Middle class, at least. They do come with better manners.
Well, my advice to you is that you can book a flight on a private plane. Many people are doing that nowadays, assuming that they have the funds.
Flying is for lack of a better term, a shared experience. It depends upon a certain level of civilized behavior. Sooner or later one of these brawls involving 20 our more people is going to break out in mid air. What would you do if you are on the flight. You can't run away. If you try to intercede you are liable to be set upon by the whole group. The flight attendants and crew won't be able to help. Middle class and better doesn't sound so bad.