Jeff Sabatini is a bit confused when it comes to understanding the benefits of federalism. He states (May 2016 article on driver ed) that the lack of consistency in regulations from state to state make it difficult to measure which GDL (graduated driver licensing) laws are most beneficial. The opposite is true. Having states with different laws is the very best way to compare any government policy. The states with the most effective laws will naturally improve the whole as other states are forced to better themselves to maintain population (tax slaves).