The problem with that is, people (usually rich people) will stop buying expensive stuff in the country, and they start buying them from another country that does not have any sales tax. Rich people avoid taxes and poor people are now stuck with the VAT on their daily needs.

Or, as a government professor I once had said, "You can only eat so much filet mignon a day."

Variants of that are even older. Here's one variant of a quote often attributed to Adolphus Busch: “You can only drink 30 or 40 glasses of beer a day, no matter how rich you are.”

Tax purchases made overseas.

Tariffs are already used a lot.