But clothing is a persuasive communication tool, especially in a world where imagery and brand is all. Where were your advisers, John? Changing that pastel polo for a blue business shirt, (and keeping the sneans), for a meeting later didn't help. It reeked of Obama - and we all know fashion isn't his forte.
Benny Castles, menswear designer for the label World, believes that although Kiwis are casual when it comes to dressing, a PM or a member of Parliament should never be seen without a suit and tie.
"I don't think I ever want to see a politician in anything but a suit. I'd like to see Mr Key in a suit at the beach, on a treadmill and especially at New World on Sunday morning amongst the veges. We are trusting him with every single tax dollar, do you really want to see him in a pair of cargo shorts and a muscle T?"
Or this season's wardrobe must for men, a cotton deconstructed blazer in navy, would have been perfect. It's smart casual and at its best when worn with a T-shirt and jeans, even with a pastel polo.
As Viva's menswear editor, Andrew Glenn, says, the "DB" is a winner thanks to its relaxed shape; it is the weekend's sartorial answer to the buttoned-up midweek suit.
Another option, says Castles, is the trench coat. "Think Humphrey Bogart in Casablanca, Peter Sellers as Inspector Clouseau or Gerald Ford whose trench coat was bullet-proof." Not unlike Mr Key himself, last weekend.