Replace sales taxes with more progressive taxes. Back in economics class we learned about multiple types of taxes, including progressive taxation, in which taxes scale upwards as people's ability to pay them increases, and regressive where taxes are levied regardless of abilty to pay.
Sales taxes are regressive.
They hit everyone from the rich buying an expensive sports car, to the poor just buying a loaf of bread. Maybe the states should just look for alternative methods for financing. Preferrably using more progressive taxation. Like property taxes, income taxes, etc. Once we remove the need for the states to be worried about how to pay for needed services, by giving them a better way to generate revenues, we can allow e-commerce to grow in a natural way, based on better technology, increasing trust, and better economies of scale, rather then be oppresed by simple greed.