The states without income tax tend to have consumption taxes that are much higher to offset them as well as property taxes. I've lived in two of them (WA, TN sans dividends) and study after study shows the poor in those states along with NV and TX are some of the worst off compared to states with income taxes because they share a disproportionate funding into state coffers compared to other quintiles when compared to states with modest income taxes. This isn't to say things are great in WV and Mississippi everywhere, but there's some commons trends across very politically different states only joined by lack of income taxes.