Sorry to burst your bubble(hehe), but it's really pretty much impossible for bitcoin to have no government regulations. Heck, I can almost guarantee it that more countries are going to ban bitcoin(probably temporarily) once they feel threatened enough by bitcoin. Probably a better and more realistic sort of "dream" would be for the governments to declare bitcoin as legal tender, and to implement sort of "fair" tax laws concerning bitcoin and cryptocurrencies. Yea taxes suck, but let's be real here. They're going to make money off the taxes as much as they can.
Well it is inevitable actually. They know what comes inside their country and if they know that some are crawling under their tunnels, they would pretty much look into it and if it seems like an "exploit action" for them, they would consider doing action and charge people for doing it. I wouldn't mind if taxes will happen in Bitcoin, just let it be considered to be a legal tender (as you mentioned) to pay merchandises and pretty much everything that are under them and not banned.