In a peculiar paradox, the political ideology that tends to be more critical and demanding of the wealthy...is wealthier.
I'm quoting wikipedia, given that it's well formatted and combines information from several sources. The studies are linked to organizations such as the Pew Research center.http://en.wikipedia.org/wiki/Political_ ... ted_States
That liberals are more educated than conservatives is hardly a surprise. I suppose it's a logical extrapolation that liberals are also more affluent. Liberals aren't very likely to be married, possibly because they are young.
Additionally, in the US most democrats don't actually consider themselves to be liberals. Indeed, Republicans on average are wealthier and more educated than Democrats, but liberals as a minority subgroup are by far the most educated in the United States.