Their being taxpayers is not the problem. Their wanting to raise those taxes is.
Any reason to leave a blue sate is fine so long as they leave the blue state “stupidity” behind. Several western states have been ruined by liberals dragging their bad blue state baggage of ideas to a new location, only to demand those same ideas be incorporated into their new locations. It is the same as those who migrate to America and demand the rules and laws of their prior countries be allowed here in the U.S. Make the “state” migrators sign an agreement to abide by their new (red) states rules or stay out. If it’s not broke, don’t fix it.