> If Warren Buffet had his wealth spread amongst millions of families, would each one be willing to give up 90% of that wealth?

This question doesn't make a lot of sense. Of course they wouldn't be, because any middle- or working-class family can actually conceivably spend 90% of their wealth.

Instead of allowing Warren Buffett to accumulate such a large quantity of wealth and relying on his whim to donate that wealth to good causes -- something which most billionaires don't do -- shouldn't we have redistributive mechanisms in place to ensure this money goes to people who can actually use it?

> 2. The winnowing of the middle makes redistribution more palatable.

More palatable? If we accept that the rich are likely to attempt to hold onto their wealth, then why would they not spend much of their significant resources establishing and entrenching policy that does not affect redistribution?