And those five get the job done. Let's see how they do it before we decide that states MUST tax out of state purchases.
Let's do!
Alaska = oil royalties galore plus being the 3rd highest state for federal funds received per dollar of federal tax paid (1.84 received per 1.00 submitted to federal coffers)
Delaware = Franchise taxes on businesses (most fortune 500 companies are HQed there) accounts for 1/5 of state revenue. They also have like 8 people in the entire state.
Montana = Ranked #11 in federal dollars received per dollar given. 7% income tax for every dollar above 17000 or so. Moderate, but still appreciable, Oil & Gas revenues.
New Hampshire = Let's pretend they have no sales tax, even though there's 9% tax on food. 1.5% transfer tax on real estate. 4th highest rate of property tax by % value in the US.
Oregon = the only one that I can't really find any offsetting, obvious reason for being able to afford no sales tax.
this is an incomplete analysis, but as you can see, the states that survive with no state income tax are taxing their citizens heavily in other areas, are extremely small in population (4 of the 5 are in the bottom 20th percentile in terms of population) so there isn't a large expenditure-side pressure, or have large sources of natural resource revenue. there's one true outlier in Oregon.
also, states don't impose use tax because they love tax grabs - their domestic businesses are at serious competitive disadvantages if use tax doesn't exist. it's not just a revenue thing, it's a fostering in-state business thing. how do you think Mom & Pop's Electronics MegaStore, Inc. of Methuen, MA likes it when all of his customers can drive 2 minutes into NH and get a 6.25% discount on goods in perpetuity?