I don't know about "enormous cost"... if we're assuming that you can handle taxes this year, the changes to support next year have to be comparatively minor. I

I don't know about "enormous cost"... if we're assuming that you can handle taxes this year, the changes to support next year have to be comparatively minor. It's definitely true that you need to keep current or the value of your service crashes to zero. But nobody is arguing that governments shouldn't update their tax codes.