"What if states got rid of their sales taxes"
At the state level, some odd math comes into play. They actually have to consider the *expense* of a tax compared to the revenue it brings in. The expense of overseeing a sales tax is huge, having to pour over the books of every business in the state.
And it is just one of the taxes levied on business. So if you combined business taxes, with the idea of ending the sales tax, you would likely get business on board if you could show them they would save money as well as the state saving money.