The New Zealand National Party is facing accusations of spreading “misinformation” following a social media advertisement that attacked the Green Party’s proposed tax reforms. The 41-second video, posted to the coalition party’s Facebook page, claims that high earners would lose nearly half their income under the Greens’ plan. Specifically, the ad asserts that anyone earning $160,000 would be required to pay 45% of their total income in tax, a statement political opponents argue fundamentally misrepresents the mechanics of New Zealand’s progressive tax structure.
Under the Green Party’s policy, the 45% tax rate applies only to the portion of income earned above the $160,000 threshold, not the individual’s entire salary. The proposal outlines a progressive system where the first $10,000 is tax-free, followed by tiered rates rising to 33.5% for income up to $159,999. By mischaracterizing how marginal tax rates function, critics argue the National Party is either intentionally misleading the electorate or demonstrating a profound misunderstanding of basic economic principles, which they describe as particularly ironic for a party that markets itself as being fiscally responsible.
The Green Party has hit back firmly, with communications director Megan Hubscher calling on National to correct the record rather than continuing to “stoke fear” about a fairer tax system. The Greens maintain that their policy is designed to provide tax cuts for 96% of the population, claiming that an individual earning $170,000 would only see a marginal increase of $23 in weekly tax. Furthermore, the broader Green package includes a 2.5% wealth tax on net assets exceeding $10 million and a capital acquisitions tax on large inheritances, measures they insist will impact only a tiny fraction—less than 0.3%—of the population.
Controversy surrounding the advertisement has been compounded by technical scrutiny, with watermark detection tools identifying the presence of Google SynthID in the video. This suggests that portions of the clip were synthesized or edited using artificial intelligence, despite the lack of a clear disclosure label on the Facebook post. While the National Party previously committed to labeling synthetic content during last year’s election cycle, this instance appears to fall short of those standards, raising questions about the party’s commitment to transparency in digital campaigning.
National’s finance spokesperson, Nicola Willis, addressed the controversy by stating she had not seen the ad personally but promised to review it. Willis suggested that if the social media team were behind the error, she would be “happy to give them a bit of a lesson in marginal tax rates.” However, as of yesterday evening, the video remained live on the National Party’s Facebook page, and the party has yet to issue a formal retraction or correction regarding the specific mathematical claims made in the video.
The incident highlights the growing tension in New Zealand’s political landscape regarding the use of sophisticated digital campaign tactics and the challenges of policing political discourse. While the Greens have faced their own hurdles—including a recent “typo” in their revenue projections that forced a $200 million downward revision—their supporters point to this incident as evidence of a coordinated effort by the coalition government to weaponize misleading data. As the debate over tax reform continues, both parties remain entrenched in a battle over public perception and economic credibility.