There is a budget shortfall in Alaska, hence the vote on an income tax. Regarding the permanence of the Permanent Fund, it is a quasi-private corporation funded by an oil revenue tax. The legislature has tried to gut the fund many times, always unsuccesfully. Last year a bill was introduced to pay each resident a lump sum $25k, with the understanding that the state could spend the rest. It was voted down. Of course things could change and the state could destroy that golden goose, but the people that originally envisioned this fund set it up in such a way that this is unlikely. However, if oil prices fall again the state will eventually pass an income tax.