Why MPs can switch parties without losing their seats in Australia
Under Australia's Constitution, MPs can change parties and keep their seats because they are bound to their electorates, not their parties.
When voters elect an MP, are they choosing a person or a party? MPs can legally switch parties without facing the voters again because they are bound to their electorates, not their parties.
Barnaby Joyce's recent move to One Nation while keeping his New England seat is the latest example, but Fatima Payman and Lidia Thorpe have done the same. The Constitution treats MPs as individuals with duties to their electorates, not party agents.
They can only lose their seats through resignation, death or disqualification, not by leaving their party. Constitutional expert Professor Anne Twomey explains that MPs have a duty to serve their community according to their conscience and cannot be compelled by their party to vote a certain way.
However, voters who backed a candidate for their party's policies feel betrayed when that MP defects.
- Professor Anne Twomey
- Constitutional expert
- 2024
- Fatima Payman left Labor
- 2023
- Lidia Thorpe quit Greens
- New England
- Joyce's electorate
Why it mattersAs more MPs change parties, voters are questioning whether the system respects the mandate they actually gave at the ballot box.
AustraliaThis constitutional debate affects how much Australian voters' choices matter and whether Parliament truly represents their intentions.
✓ Claims checked against the source. checked 11 d ago
