The first is that they protect from some sort of lone wolf defection, and that's what's been talked about most in this debate, but it's only one of three. That's in the situation where the distortion of political proportionality is the issue, and it was summed up by Chris Bishop when he said, "We want MPs to say unpalatable things."—as if he wasn't saying that those things would be so unpalatable to the party that the MP stood for that they would face expulsion. The idea here is that one person acting alone can be the critic and conscience of the country, that they can say unpalatable things, thereby holding back a Government from doing something it was elected to do. That's a fantasy; it's not what's at stake here. Every brooding, complicated heartthrob in this place sees themselves as the person who will stand against the tide of a Government who has lost their moral compass. So do; in that situation, resign. Use your enormous platform that your resignation has bought you to say the thing you so passionately believed. You can exercise your freedom of speech, and not the one that you earned from the voters who elected you.