> On the other hand, if the taxes are not included in prices then you will see which one has taxes at checkout and elect not to purchase the item with taxes, preferring the item without taxes.
Why would you care? Having taxes included in sticker prices doesn’t change how much it costs you, only what percentage goes to your government. The only situation where not including taxes is potentially useful is when you explicitly don’t want to pay taxes, but you’re still happy to pay a higher price, if it means less money to the government.
Also in Europe we have a very simple solution to this problem. Every price tag has two numbers. The number in big font includes taxes, the little number underneath is without taxes. If you’re desperate to avoid giving cash to the government, then you just need to find items with the smallest delta between the two numbers. Retailers are also obliged to display both numbers, and provide a tax breakdown on your receipt, so you penny pinch your taxes to your hearts content.