I'm not sure it's so simple. There are, certainly, groups within the Democratic party that suck on the public teat. But keep in mind that urban, educated, professionals are also a big part of the Democratic party (they're the ones who catapulted Obama to the Dem nomination). And these are people who tend to work longer hours and pay more taxes than a lot of GOP supporters in middle-America.
Plus, if you look at the States that pay more into the Federal treasury in taxes than they get back, the Blue States are the ones subsidizing the Red States.
The other battle this year is within the Democrat party. On one side are the Clintons, the DLC, what’s left of the old Scoop Jackson wing of the party, what’s left of non-public sector unions, rural and small town Democrats and the PUMA’s. On the other side are Obama, public sector unions, Moveon.org, George Soros, the Daily Kos, indoctrinated students with little sense of history, and urban, upper middle class professionals who were radicalized in the 60’s and never quite recovered. The first group may give lip service to an Obama victory, but they actually want him to lose and lose big. Consequently, Obama will underperform the last polls before the election.