Labour is warning the Government it faces hard choices over national super.
Backed by a poll showing most people think the pension age should be raised, leader David Shearer says Prime Minister John Key can't maintain an attitude that "somehow the future will look after itself".
A sharp focus has been put on the issue by a new report saying the cost of national super will double to 12 percent of gross domestic product by the end of the century and tax rates would have to increase by 28 percent to pay for it.
Labour says the Government must decide whether to raise the age, raise taxes, or cut entitlements.
Mr Key says there's no need to do anything until at least 2020 and he isn't backing of his 2008 pledge to resign from Parliament if anything changes under his watch.
Mr Shearer says the problem has to be addressed now.
"At the moment there are 5.6 workers for every retired person but in less than 30 years that will be reduced to 2.5," he said.
"We must be fair to young New Zealanders by making sure there will be a pension scheme in place for them when they retire."
The TV3 Reid Research poll, released on Monday night, showed 63 percent of 1000 voters questioned thought the age - currently 65 - should be raised to 66 or 67 from 2020 or even earlier, while 37 percent didn't.
The Council of Trade Unions is concerned there will not be enough jobs to go round if the pension age rises by a couple of years.
Peter Conway says the debate is worrying its members.
"To have the qualifying age for national super pushed out at the same time as we've got discrimination against older people in the workforce, it's clearly going to have a damaging impact."
NZN / RadioLIVE