As the Feds gradually gain power over everything that used to be left to the states and to localities - not to mention to the individual citizen himself - the wonderful Federalist concept of states as "laboratories for democracy" has been whittled away.
But the arrogant and power-intoxicated Feds still cannot control state and local taxation. Willisms has one of his excellent graphs demonstrating the out-migration from high-debt states.
High-debt states are, inevitably, high-tax states, because they run their government on a credit card. Good piece at Cato on the subject of soaring state and local debt. Some localities are spending 30-40% of their tax revenues on debt service. That is no way to run a railroad.
Image: The Commonwealth of Massachusetts, famous for being a laboratory of incremental socialism