Any tax increase would have to be on the ballot, the voters have to directly approve. There's no way it would pass. And it isn't "Colorado" that's wanting to go to this system, it's 156,000 morons in Colorado who signed the petition to get it on the ballot (in other words, about 5% of eligible voters).
It's just Boulder people and a few nuts in Denver blowing smoke (haha, get it?)
That’s all it takes to get on a ballot? Democracy is nuts.