If someone in my party doesn't vote for my party's candidate I don't try to change it because I respect their right to vote for any candidate they want to. It would seem that Labor does not respect this and tries desperately to change people's votes if they don't vote the way that they wanted them. There is a campaigning time and then there is election time. If you've failed to get somebody's vote before the vote then you've failed to truly win their vote. Maybe if you have a defection problem you should try to address the reason why you got defections and try harder next time instead of having a fit every single time on of your members votes for someone else.
Bro your running mate is literally the originator of this technique. Glass houses etc.