He must be kidding. Every state in the U.S. with an income tax probably does this. People who commute to New York City from New Jersey and Pennsylvania have been doing this for years.
Don't be dense. - That is exactly the reason why the demographics are changing so radically out of those states and into other states unlike them.
Are you aware that Florida's population is now larger than NY?
and it isn't all immigration, thats for sure, because tons of immigrant go North for the social handouts that simply do not exist there.
Which makes the taxes in those states get higher yet
See the picture?
My understanding is that they pay on money they made in the state and not on money made out of the state. There was a fierce legal battle between NH and Maine a few years back because Maine wanted to tax a family's total income even if some of that income came from a spouse and was earned in NH.