Ardern is in power because of a deal with the Kiwi equivalent of our Hanson. She’s unlikely to get a second term. Using someone like her would have an effect on uptake, but it wouldn’t be in the way you want.
It’s interesting that I made the comment about this needing to be better sold, and we have everyone jumping to what amount to celebrity endorsements. I really don’t care which talking head is involved, it would simply result in my turning the page, or turning off. Talking heads historically are there to lie to us. Why listen to this one?
Perhaps a politician telling the truth, instead of muttering vague generalities is all we need. A simple statement of “when we get X%, we will immediately relax the lock-down”. Until they are prepared to say that, then you can be pretty sure that it isn’t true, and so if the lock-down isn’t to be relaxed immediately, then for many, perhaps most, there is no immediate rush to install anything.