Having lived in the US this reasoning makes absolutely no sense. It's not like every store charges MSRP or that stores don't have sales. Every store pretty much

Having lived in the US this reasoning makes absolutely no sense. It's not like every store charges MSRP or that stores don't have sales. Every store pretty much has its own pricing and they have no problem showing this specific store's pricing without the added tax. It would be ridiculously simple to show that specific price with taxes added.