You're talking about it more in practice, not in what actually is supposed to happen.
Canada at its core does not have a representative government, it has responsible government. At its core you are voting for the PERSON you think will do the job best and are tasking them with the responsibility of that. You're not voting for someone who represents your every view.
The MP who crossed clearly thought that the responsible thing to do, in order to get the best results for his riding, was to work with the current Liberal party rather than whatever is going on with the Cons.
The Cons didn't win the seat, the man did as a member of the Conservative Party.
This happened in my hometown riding when the NDP gal there broke from the NDP on the issue of gay marriage, voting against it. She didn't lose the seat and became independent. She couldn't run as an NDP the next time around though, clearly.
Lindsay - Jan 13, 1990 - July 17, 2023
Thank you for fighting the fight for so long for me.