[ahomescu1]

> Still, the "upper class" category lumps together the merely wealthy (smallish business owners, the most successful professionals) with the extremely rich, and all possibilities in-between.

It also lumps in the high-income earners with the high-net worth people (the ones everyone thinks of when they say "rich").

[crpatino]

agreed, you can only do so much when modeling a complex system with a single variable distribution.