Additionally the idea that new money flowing into the system from 401Ks, IRAs, etc is extremely naive. These are long term investment instruments sure but as they are generally not actively managed they are not immune to fluctuations in the market and the market is not immune to people who have the misfortune to retiring in an economic bust. I have observed this in the second person as my grandfather was well to do before 2008, did not listen to my advice to allocate his retirement money to a guaranteed interest plan until after the market hit bottom (which was the wrong time to do that) he basically lost 500k.