Bridges' criticism of Coster is clever politically. It strikes all the right notes for core National Party voters. Coster's been in the job only 11 months but has likely already riled plenty of those blue voters. He's tolerated unlawful iwi-led checkpoints. He's tolerated bikies tormenting Auckland motorists on Waitangi Day because he'd removed the ability of his front-line officers to pursue in that situation. He's abandoned the Armed Response Team trial. And he's now advocating "policing by consent", which is broadly a concept that means whatever you want it to and, to many, it will simply sound like asking criminals if it's okay to arrest them.
Coster may have already realised he's perceived as soft on crime. That could explain his announcement of his gang crackdown - Operation Tauwhiro - last week. It's a nothing announcement. It sounds tough but has no extra resources or funding attached to it. Unless he completely abandons his commitment to progressive policing (publicly at least), he will continue to be perceived as soft on crime and will continue to give National attack lines.
Finally, Bridges' attack works because it's indirectly an attack on the Prime Minister. Because Coster is Ardern's personal appointment and mirrors so much of her own ideology, he is the uniformed, male version of the Prime Minister. National can't attack Ardern directly because of her popularity but they can attack those who represent her, and Coster is a perfect target. Because he is perceived to be soft on crime and because he is perceived to share Ardern's values, she may find herself slightly splattered by attacks aimed at him.
It seems Bridges doesn't have the total backing of his leader in calling the PC a "wokester". Judith Collins intimated that she had told Bridges off privately.
She ought to do the opposite and thank him. He's just run the best political play Nationals' had in a long time.