The Greens are playing hard-ball on tax, floating the prospect of sitting on the cross-benches if Labour doesn't take a more extreme position.
Labour has promised no tax changes other than a new income tax bracket covering the wealthiest two percent of New Zealanders. But the Greens want to go further.
The topic was still on people's minds - as party leaders spread out around the country, making their case to lead the next government.
But, as RNZ deputy political editor Craig McCulloch reports, not everyone is following all the rules.