[sailfast]

I pay 0% VAT if I order from a country with VAT and ship to the US.

The key here is that when something is classified as "interstate commerce" different laws apply than if you're buying something in-state. Enforcement varies, and can be expensive, and the laws are catching up sometimes, and purposefully not present in others, depending on the state and their approach to interestate commerce.

As an American, I'm quite happy there is no Federal sales tax. There is no reason to capture value at that level and allocate at the Federal level. States already have these taxes, and are much better equipped (in terms of need / proximity - not in terms of functioning government at times) to allocate the money toward local services.