The people on the Right don't seem to understand something very basic about game theory here. If we play a winner-takes-all game, then it isn't unfair for the winner to take all. It was the game itself that was unfair to begin with. No one is saying we should take people's deserved winnings. We are saying the rules of the game should be changed so that more people can win.
This is as American as apple pie, by the way. Thomas Paine proposed a (relatively modest) tax on all inheritances. The tax would go to a fund, so that a certain sum (I think it was $200?) would go to each citizen who turns a certain age (like 24). Each person could then use that money to get an education, or vocational training, start a business or buy a farm, etc. In other words, we play a game where everyone gets a reasonable chance to win. "Libertarian" objections that such measures amount to rewarding laziness and disincentivizing the entrepreneurial spirit are pure nonsense.
By the way, how much would Bill Gates' net worth, or the inheritance he leaves to his children, have to go down before it would begin to affect his motivation as a teenager to start Microsoft? Do you think when he dropped out of Harvard, he was thinking, "I'm only going to do this if I can be worth $6 billion someday ... but if the reward was only $2 billion, I would give up my dream of starting a computer company."