People think of a parasite as simply taking money, taking blood out of a host or taking money out of the economy. But in nature it's much more complicated. The parasite can't simply come in and take something. First of all, it needs to numb the host. It has an enzyme so that the host doesn't realize the parasite's there. And then the parasites have another enzyme that takes over the host's brain. It makes the host imagine that the parasite is part of its own body, actually part of itself and hence to be protected. That’s basically what Wall Street has done.