The only thing one needs to understand about Bernie Sanders is that he's a Marxist. Given the chance, he and others like him will systematically destroy the US. He and his ilk are to be opposed at every turn.
Yeah, they throw out these absurd figures like it's nothing. (Well its actually other people's money, so they don't care.) I guess Bernie really thinks he's doing us a favor by swindling only $16 trillion for his fraudulent scheme. What garbage.