I may be simplifying, because I have a few seconds, but I'll make an analogy using apples. There's the Granny Smith, the McIntosh, and there are others. That's all. There's no other labelling. These products come from Vancouver Island or Quebec, and they're distributed by the government. Apart from the name and the information, you don't need to advertise, have different packaging or identify the producers. You only need to indicate where the product originates from and what it contains.
I may be wrong, but I have the impression that if the government takes over, the whole aspect of advertising and packaging, which is the problem we see with cigarettes, will be eliminated.