Statistics New Zealand has released the income data from last year's census, which includes the following graph about changes in personal incomes:
I think this speaks for itself about the effects of a Labour government. Increases to the minimum wage and in income redistribution through the tax system have seen people move out of poverty and up the income scale. The median income has risen from $18,500 to $24,400 - an increase of 32%, well above the 13% rise in the CPI. Compare this with the effects of the 80's and 90's "reforms", which saw the median income fall and people actually made worse off in real terms for the sake of the ultra-rich. As an ordinary New Zealander, who cares about the incomes of real people rather than just those of the ultra-rich, I know which policies I'd rather live under.