If the taxpayers of the state do not object then what business is it of yours? It’s their money, their state, and their business. If they didn’t like it they would change things at the ballot box, and if it couldn’t be changed you could always move to a state that did things your way.
Because the Constitution says there are certain things the states may not do in interstate relations. It is the same reason that an interstate internet sales tax isn't allowed unless a multi-state company has a physical presence in the taxing state. The Founding Fathers understood why. You apparently do not. I'll trust their judgment over yours any day.