Technically, the financial collapse happened years ago - once systems are debt (and fraud) based, the rest is just timing. So the causes are longstanding and not really down to him speaking up. Systems propped up by perception can last much longer than they should, which is what we are seeing, but eventually the maths force collapse. Since the majority of people seem allergic to maths and monitoring the financial systems that their lives revolve around, there is lag involved. I'm not saying his version of things is 100% accurate by any means, but it is interesting to hear him speaking out.