I agree but I think it's more subtle. Most of us look at billionaires and think "why would anybody want so much more money than they need?", identify this as t

I agree but I think it's more subtle. Most of us look at billionaires and think "why would anybody want so much more money than they need?", identify this as the vice of "greed", and implicitly stear ourselves away from that vice. However, the quantitative disparity here makes these phenomena qualitatively different. As you said, employment is a business transaction and should be treated as such, and this attitude only becomes a vice when it dominates someone's life (as in the case of the billionaire).