This is an interesting look at how pessimistic people have become in the United States. Despite having everything, Americans are still a miserable lot. Despite an extremely high standard of living, it's all going to hell in a handbasket.
I think the transformation of companies into temp agencies is helping this along. When no one has stable work, the country isn't stable at all and very few risks are taken. Fewer people buy new cars and homes, more people hoard and hunker down. This is not conducive to growing an economy.
That, and everything is Obama's fault.