The libs se this as a way to garner votes and a tax windfall. However in reality is is a cash cow for a while, but eventually it has a diminishing return. Like gambling, when casinos were few and far between they were very profitable, now they are almost everywhere and not as profitable as they once were.
With the pot, the states will build a multi million dollar beaurocacy to tax and control it. the added costs will eventually kil the demand as it is a weed and you can grow your own for free. and then the black market will end up selling the over supply at a discount.
There are lots of unconsidered consequences with this, and I don't think it will end well.
There is a show called the profit with Marcus Lemonis, he went to california and looked into this, it is an eye opener.