“nothing will change at all”
No offense, but up until 3 weeks ago, that’s what most people in the U.S. were saying, too 
But I agree that this Xenophon guy is just grandstanding. He’s clearly out to make headlines. All the same, the Aussie situation isn’t that different from the U.S. The market’s only loosely regulated, and a bit of government intervention wouldn’t surprise me too much at this point.