That's why sometimes I like USA because mostly every thing is on control and you can find useful information there.
Well I would say that USA doesn't want to be last I think even if the government doesn't have a good relation regarding bitcoin, they are still using the convenient of bitcoin the fast transaction and the earning their country could undergo when they surely accept something like bitcoin, or maybe the government doesn't involve in this kind transaction because it doesn't have a tax that they can manipulate but we would never know for sure.
Bitcoin currently is not designed to calculate the taxes all over the world for the companies that make sales in bitcoin because the percentage changes and the developers have not think about this yet.
But I think that these can be taxed in other ways using third party application that includes the sales in fiat and in bitcoin in one place like shopify.
I think there is in an other form of transaction I think they are certainly getting something on a transaction regarding bitcoin but not much, and I think there are just a few of that transaction that has a fee over tax and not fully all of it, that is why bitcoin is not sturdy on the side of the government because you can not fully control it.