Social Security and Medicare are used by people that are not retired, and many have moved to the south. They paid in the past (To support their Elders) but are not the Elders. That is a good reason there are transfers to Southern States.
Texas cannot secede by it’s constitution, but can be broken into 5 states. Gov. Perry was just joking around.
Given the will to do so, any state can regain there sovereignty. It is a God given right.