Paula Bennett says she had "great gossip" but couldn't use it

When Paula Bennett first heard about Winston Peters' super overpayments, she knew it was "great gossip" she couldn't use against him.

"As soon as I heard it, I went, 'Right - this is controversial... but I can't tell a soul,'" she admitted to The AM Show. 

In July, Mr Peters received a letter from the Ministry of Social Development saying he'd been overpaid since signing up for the pension in 2010.He paid it back immediately, but in late August - right in the middle of the election campaign - the details were leaked to the media.