Oh don't worry. If you try to deposit it at a bank, they'll start asking questions right away on how you got the money. Unless you never bring it into the "official" system, the financial surveillance system will find it.

And it's objectively a worse experience for it.

Same in the Netherlands. They are pretty much the default really. And while theoretically they can be used for surge pricing, they aren't. First, that's a great way to lose all trust your customers have in you and make them go to a different store. Second, I'm pretty sure that's illegal.

On the plus side for you Americans and Canadians, maybe you can finally get rid of that habit of showing product prices excluding tax. There's no compelling reason for maintaining that if updating your pricetags is a matter of seconds.