The letter says: “We know that high inequality undermines all our social and environmental goals. It corrodes our politics, destroys trust, hamstrings our collective economic prosperity and weakens multilateralism. We also know that without a sharp reduction in inequality, the twin goals of ending poverty and preventing climate breakdown will be in clear conflict.”
Yeah I know, not by some standards, really depends on your Overton window.
She led a majority government on centre-left policies in New Zealand so that still meant she was in charge of a Monetarist economy with all the neoliberal economics that implies, but she also presided over a massive tax revenue transfer to working class families that is still going on today.