If all unions combined only manage to donate $120,000 to the Labour party a year, by my reckoning that would be well under 10c per worker per year. There would be some supporters of National who could donate a fair chunk of that amount without even blinking. The difference might be that workers on PAYE have already certainly paid at least 20% of all their main income to the govt.
http://www.nzherald.co.nz/nz/news/ar...ectid=10779910
Perhaps I should disclose that because I feel the Labour Party is on the right track for NZ in general, I donate small amount each month. Amongst all my other expenses, it's negligible.