They can't afford to secede.
Most Red States Take More Money From Washington Than They Put In
—By Dave Gilson | Thu Feb. 16, 2012 3:00 AM PST
Even as Republicans gripe about deficit spending, their states get 30 cents more federal spending per tax dollar than their Democratic neighbors.
lots more:
http://www.motherjones.com/politics/2011/11/states-federal-taxes-spending-charts-maps