ELIZABETH WARREN'S "freeloading billionaires"?

Warren isn’t stupid, unlike so many Democratic presidential contenders. She knows she is dead wrong, but, because of her overweening lust for power, she doesn’t care. She and her husband are wealthy beyond the dreams of almost all Americans, but, to fuel her burning ambition, she lies about 600 people who are even richer than she is. This woman must never come near the presidency.

I'm inclined to question Hinderaker's assertion that Warren 'isn't stupid'. How else do you explain her Medicare for All proposal?