Sure, legal tender demands a government by definition, it’s right there in the word “legal”. Money, or rather currency doesn’t. That’s also irrelevant because

Sure, legal tender demands a government by definition, it’s right there in the word “legal”. Money, or rather currency doesn’t. That’s also irrelevant because that doesn’t address what a tax is, or how it ended up in a government’s treasury, or why it is there in the first place.