[gentaro]

> You can afford the tenth car because you already contributed to the common good to earn that money!

I'm not trying to offend you, but the notion that your compensation is necessarily proportional to your contribution to public good is terribly naive.

Surely you can agree that there are an endless number of unscrupulous ways to acquire money that don't contribute to public good, in fact, the opposite is often true. Take a corrupt public official, for instance, their contribution towards society is usually many times inversely proportional to their compensation.