So if you ran a small business that paid in USDs but your state had a currency with twice the buying power, you wouldn't go to a (free) state run currency exchange to turn your USDs into the state currency to put more money in your account? You don't expect, as this currency becomes more widespread by this effect, that your customers would start paying you in this currency to get what you were selling for a lower price? Even when things eventually balanced out, your state currency would be worth just as much as a USD and not subject to the machinations of the Fed and be somewhat insulated from economic downturns.
All the while, the people of your state get a low tax burden UBI reducing if not eliminating poverty, your state government gets to save money as it reduces welfare spending to match the UBI and the state is better able to handle the steady automation of the economy.