Forget that silly lime-green midget car roaming capitals of the world, blaring out the benefits of Kiwibank. The TV commercial’s a total turkey, compared to the huge attractions offered by Kiwibank ATMs, where you might double your money.

This week, Kiwibank’s Queenstown ATM was like a pokie machine where everyone’s a winner.

(The Allied Irish Bank set up branches in the United Kingdom some years ago, and it was always a favourite place for smart savers. The tellers were so thick that you often got more money from them than you’d asked for. Customers are always looking for ways to beat the bank, and the Irish were a soft touch.)

Kiwibank’s classic home-grown cock-up, where somebody loaded the bins with incorrect denominations, has enormous marketing potential. You just need to think laterally.

Here’s the plan:

Every week, Kiwibank randomly picks one ATM in the country and deliberately sticks 50-buck notes in the 10-buck tray. There will be street riots all over the nation, Kiwibank will become hugely popular, and it could knock some serious socks off Lotto’s Saturday night viewing figures.