Seddon justified his drive for equality by simply defining it as "fairness", an easily grasped and thoroughly positive concept with broad appeal.
Can it be fair, for example, that decile 10 schools serving the wealthiest communities get more than $1000 more a pupil each year than decile 1 schools, a fact revealed by the Council for Educational Research?
Recent international bestsellers on this subject underline the malign results of increasing inequality.
French economist Thomas Piketty, in Capital in the Twenty-First Century, argues compellingly that the widening gap between rich and poor is a basic fact of lightly regulated capitalism and that the answer is a tax on wealth and explicit use of redistribution measures similar to Michael Cullen's Working for Families policy.
American Nobel laureate Joseph Stiglitz, in The Price of Inequality, contends that if we don't address inequality we'll end up paying the costs dearly in health, police, prison and a myriad of other budget lines.
In the final analysis, he argues, the ultimate victim may be democracy itself.
Labour strategists and spin-doctors should dust off Seddon's speeches.
He remains New Zealand's longest-serving prime minister and his sister married a Cunliffe.
• Mike Williams is a former president of the Labour Party.