We could learn from for example Japan where there is no cents and all fees included so 5000 Yen is 5000 yen no tip no tax no fees no cents it's really cortisol reducing.
①However, by law the price tag is required to also show the with tax（税込） price if displaying the without tax price.
Sales taxes are in general regressive and harm lower-income people the most, so they should be visible and attributable to government.
I have no desire to learn what the tax rate is for X in any state at all (since I cannot vote to change it in any case), what I am interested in day-to-day is the all-in price of whatever I’m about to buy.
Eliminating junk fees (looking at you, AT&T) is a net win for reducing cognitive load. The idea I should have to learn the tax rates of the multiple jurisdictions I may or may not be in just to serve your political views is fucking asinine.
Oh please. When taxes go up, people notice. In California, new taxes have to be approved directly by voters, even. If you choose not to be civically engaged enough to notice new taxes, that's your problem.
This is the same dumb argument people use for not allowing the IRS to send us a pre-filled tax return. Instead, we flush billions of dollars a year down the toilet on tax prep.
Prop 218 [1] is unique to California.
[1] https://en.wikipedia.org/wiki/1996_California_Proposition_21...
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.