[pentamassiv]

I think they want the price to be the amount they will have to pay to get the item or service. On the bill you can then split up the price into taxes, tariffs and whatever else you want so they are not thrown into the same bucket.

That way there's no surprise at the checkout and you still see how much of the money goes to whom.

It works very well in the rest of the world

[breadwinner]

The reason that works in the rest of the world is, taxes are the same throughout the country. For example in the UK, the standard VAT rate (20%) applies uniformly to most goods, throughout the UK. So the price can be printed on the label. In the US some states have no sales tax at all, for example Oregon.