Should a Member of Parliament lose their seat if they defect from their political party? 

The Tasmanian Government has proposed the enactment of a 'stability clause' which would vacate the seat of a Member of Parliament who ceases to be a parliamentary member of the political party that endorsed them at the time of their election. In other countries, this is known as an anti-party-hopping law, or an anti-defection law, or even a 'waka-jumping' law.
This video discusses the reasons for the enactment of such laws and the serious criticisms of them as anti-democratic measures. It will be followed by another video that looks more closely at the drafting of such laws, their constitutional validity and the problems with their interpretation and application by the courts.