How does a county income tax grab ya?

According to Living in Dryden, Tompkins County (think Ithaca) is thinking of replacing their county property tax with an income tax. I've never thought of that, so I haven't formed an opinion about it. But one interesting thing sticks out right away: renters would be contributing to county coffers. That's something we get now only via sales taxes, and indirectly through the property tax the landlord pays on the property as a whole.