"My role is to engage with Maori communities and I get out and about in that role often. People might perceive this as glad-bagging around but actually it's work I'm out there doing," he told media today.
"I do think it's important though, that on some events, myself and my wife is there but we'll have to look at how we meet that obligation without running into the difficulties that we're facing at the moment."
He said he had not been under pressure from the Government to pay the money back.
The issue of taxpayer money funding a towbar for the chief executive's car has also been raised, and Mr Comer said it was departmental decision not his own.
"I don't have any reason to have a towbar on my car but I understand that it's good practice to have towbars on departmental cars," he said.