Hummmm....I am starting to like this idea, lol.
We do that already. Poverty rates in New England are lower than in the South, for example. Without our tax dollars going to pay for welfare programs in places like Mississippi, we would be saving money.
RedStates could demand that their earnings not be taxes for FEDERAL (PBS, NPR)TV, FEDERAL SCHOOLS, WELFARE, ABORTION, etc, and so much more.
As the chart I posted above show,s the Red States love receiving tax dollars for education, welfare, Medicare/Medicaid, you name it. Alaska, which is supposedly a place full of independent outdoorsmen who don't like government, is more than happy to take $1.83 from the Fed for every dollar they put in. Meanwhile, New Jersey, which is supposedly full of leeching socialists, gets back 65 cents for every buck it sends in to the treasury.
RedStates could have the military since we are willing to pay for it, and the commie blue states are hate the military.
I doubt the Red States could afford a good military without Blue State tax dollars.