Then there's the argument that, somehow, changing parties is a mortal sin when actually it is part of the natural evolution of democracy. Every single party in this Parliament was formed by party-hoppers. The Labour Party was formed by party-hoppers in 1916, National in 1936, ACT in 1996, the Greens in 1999, the Māori Party in 2004. Most people would accept that Winston Churchill is the greatest parliamentarian in all times. We recognise it with his picture on the way into the House. Do MPs realise that Winston Churchill changed parties three times? If this was the law in the United Kingdom, he would have been kicked out of Parliament and not been able to lead the UK out of its darkest hour. 