Unsurprisingly, the Prime Minister has chosen to hold a narrower "government" inquiry rather than the supposedly more in-depth and broader "public" inquiry.
Equally unsurprisingly, Labour is demanding the latter, while the Greens and New Zealand First want a royal commission which is effectively the same as a public inquiry but with more status.
Confusingly, a public inquiry is the same as a government inquiry in that both have powers to summon witnesses. Government inquiries are intended to deal with smaller and more immediate issues where a quick and authoritative answer is required. Public inquiries are designed to deal with "meaty" matters such as big policy changes or natural disasters with loss of life.
It all comes down to the terms of reference. And Key has yet to reveal those for his inquiry. He is deliberately drip-feeding details in order to keep his opponents guessing and regain control of the election agenda.
His bottom line is simple - to have the minimum inquiry possible and ensure it does not report before election day.
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