> They [are] doing less than their fair share.

This wording makes it sound like consumer goods and services are the moral things to spend money on and wealthier individuals are slacking. This is silly.

There are many good things other than consumer spending that wealthy people can and do spend their money on: capital investments for new or growing businesses, philanthropy, research, etc. etc. etc.

In fact it would probably be better if wealthy people spent less money on consumer (luxury) goods and services and more on these other things—if they were, in your words, even farther from “their fair share.”