One of the better arguments against a federal law regulating interstate sales taxation, is that it would increase the burden on businesses that sell across state lines.

The case of Amazon suggests that regulation might actually help, though.

The number of people forced to pay sales tax to Amazon just keeps growing. DC now joins the list of states, despite the lack of a physical nexus in the district.

If we had a federal law giving states an incentive to structure their sales taxes in the same way, all these added collections would cost less for a business like Amazon. That suggests the Bob Goodlatte bill may actually be the more pro-growth idea, than just leaving the thing alone.

One intended role of the Congress is to streamline interstate commerce. Goading the states into making their sales taxes work the same way, is a great way to do that.