In per capita GDP, that is. The table below shows the the top 10 countries in per capita GDP based on the the CIA's 2010 estimates (they are not all from 2010-Liechtenstein's estimate comes from 2007, for example).
Click here to go to the CIA World Factbook. The numbers are based on "purchasing power parity," which means the differences in cost of living between countries is taken into account. But it does bother me that our most recent estimate for Liechtenstein is from 2007. With all their riches, they could be a threat. So maybe the CIA should pay closer attention to them.
Update 3-4: Commentor "Sparrow" mentioned that Qatar uses slave labor. Here is a UN report on that Trafficking in Persons Report 2008 - Qatar. Here is a recent news story Online Petition Asks Qatar to Fight Human Trafficking in Advance of World Cup.