I wonder how much food they purchase and waste though..

For example, it's not hard for me to imagine someone wealthy having strawberries delivered to every house they own, week after week, just in case they decide to visit that house and want strawberries

Maybe that's not very common, but we are talking about a class of people that will take a private jet to another city to get breakfast at their favorite restaurant there

They eat a lot more meat though. And that's much more CO_2 intensive than grains and legumes.

Yes, that is my point (although the other reply is correct - the diets of the rich are generally more carbon-intensive).