GIlliam seems to be using the same old scare tactics.  The part about, "tax itself into prosperity" is completely off-base as Alaska isn't trying to tax itself into prosperity but from bankruptcy/government shut down.  You also have to love the part about, "every state that introduced an income tax since 1960 experienced economic decline" without actually providing any causal link between the two and in complete disregard of the cyclic nature of economics to swing back and forth between periods of prosperity and scarcity.