I think this blog is trying to get people to transcend the thought that money = happiness. If you read his other posts, you can see that he often talks in terms of fulfillment, not money.
Edit: happiness = serotonin level in spinal fluid. Suicide cases show low levels after autopsy.
actually that's specifically why i chose the word "money" and not a word like "wealth", it's the skeptic in you that assumes people mean money=happiness ;)