> As a consequence, the sales tax rules are extremely local and the combination of all separate tax authorities that have jurisdiction over a specific retail location. While it might be nice if the sales tax was built into the price, it is a continuously moving target and therefore is simpler to compute on demand rather than physically repricing things on the shelves.

And don't forget, the whole Europe still can't solve that for the last 40 years!

Wait...

They did.

Now I listening for the list of excuses why this country can't do the thing the whole world did eons ago.