I hate to be the bearer of bad news, but people in countries where sales tax is included in the price (which is virtually every other country in the world), are

I hate to be the bearer of bad news, but people in countries where sales tax is included in the price (which is virtually every other country in the world), are well aware of sales tax. Many countries also exempt sales tax from essential groceries, which is not true for all US states. So the idea that the US model is somehow good for lower-income consumers is laughable.