Private jets is a very small part of airplane pollution and four people travelling in a Chevy Suburban with a big V8 actually use less fuel per km per passenger than the big passenger airplanes use per km per passenger. That's not even taking non CO2 pollution into consideration.
People in general rely on airplanes way too much, may it be for personal travel or to get shit shipped to them ASAP, it's not just a rich people issue.