We can argue about what fair is all day but it hard to say that someone who accrued $1B has contributed fairly. Warren Buffet acknowledges as much in his famous quote about his secretary paying more in taxes than he does.

Let's not let perfect be the enemy of good when it comes to equitable contribution.

All of the tricks Buffet jumped through to get his taxes that low were intended to encourage that behavior, whatever it was. So his reinvestment of profits in the company, investments in clean energy, contributions to charity, profit losses due to forgiving debts owed by people in disaster zones...whatever it all was.

Someone making laws figured all of that was "fair."

If someone followed the given rules, dealt fairly and openly with others and made 1 billion dollars they did it fairly. The huge amount of money does not make it unfair in any way.

See, my definition of "fair" is followed the law and didn't deceive others. Obviously yours doesn't agree which kind of proves my point, doesn't it.