NZ has never had a left wing government. NZ's government is neoliberal, which is not left wing in any way. Neoliberalism is in all actuality right wing.
If you're calling Jacinda Ahern a right-winger, the term has lost all meaning. Do you need the state to seize the means of production in order to call a government left-wing?
At least a few explicit examples would be a good place to start. I look forward to it.
Examples of what? You're just using a word wrong. There's nothing more to it.
Examples of any practical reason to categorize Jacinda Ahern's government as left wing.