Tell that to Sinn Fein MPs who were elected to the British parliament in all the elections since 1997 but any of whom is yet to attend a single session. Abstai

Tell that to Sinn Fein MPs who were elected to the British parliament in all the elections since 1997 but any of whom is yet to attend a single session. Abstaining from participating in parliament when you're elected or participating in unconstructive ways (i.e. by being disruptive etc.) is a legitimate behaviour. As long as you're transparent about your intentions to behave so to your voters, removing such MPs without an election would be authoritarian. If he/she is not transparent about this and this is/becomes a widespread problem it's preferable to decrease the duration of office terms or allow recall elections instead of instituting arbitrary rules (which will have to be approved by the ruling party/coalition and therefore will likely be designed in such a would which would favour them over opposition parties).