Now I think he's wrong about this. Rockefeller had a roughly ten times greater share of our nations wealth as Gates or Buffett ever had. And somehow our democracy survived and flourished, because inheritances typically get split up among children, grand-children and eventually hundreds of great-grand kids and great-great grand kids, and predominantly those descendants dissipate the wealth because they don't have the same drive or abilities as the wealth creator.
And lots of that money ends up in charities before it's all gone.