A transport lobbyist who said pensioners were "clogging up" public transport during peak hours has been slapped on the wrist - by his mum.

The Tourism and Transport Forum (TTF) has issued a report recommending scrapping concession fares for pensioners travelling on public transport during peak hours.

"You can't sustain a system where concession pensioner rates are clogging up peak-hour transport," the Forum's Chris Brown said.

But Mr Brown's mother, Jan Murray, says her son needs to "go and stand in the naughty corner" and think about what he said.

"I think it's a report he's reading from. I'm sure he doesn't believe it," she said.

"So this is a smack over the wrist publicly for him to go and stand in the naughty corner and think about it.

"You don't throw Granny off the train just to make way for a German backpacker or something."

The suggestion has also been condemned by the Combined Pensioners and Superannuants Association and Unions NSW.

Mr Brown had said money raised through road pricing should be invested straight back into better public transport.