It is understandable if the riches and powerful people are flying around the world in private jets. Maybe they don't generate the most as a whole but a lot as individuals. It is very difficult to convince anyone to lower their standards of life (eating other food / shower less / drive a smaller car) which will make a big impact while the riches just do lip services.

I don't see a future for that. Humans only turn around when they hit a wall multiple times -- we are not the exceptions.