It's been a week of back and forth for the Taxpayers' Union and the Finance Minister.
Nicola Willis has challenged Union chair and former finance minister Ruth Richardson to a debate, which was met with a sweet treat sent to Nicola and media.
LISTEN ABOVE

Martin Hawes: Are you losing money on ethical investing?
41:21

David Letele: Why are we always getting in our own way when we're getting healthy?
40:44

Nicola Willis: KiwiSaver changes to loosen restrictions on rural investors
08:20