Co-chair Dr Tracey McIntosh said the payment was about ensuring children had the best start in life. "Investment in the early years has a particularly strong link to better outcomes for disadvantaged children."
Mr Key said yesterday he welcomed the report but ruled out reinstating universal child payments, which were ended in the 1990s, or tax breaks for parents, another recommendation.
He called a return to a universal child payment a "dopey" idea.
"We went away from that some years ago in New Zealand - we have a very targeted system through Working for Families - it's highly proportional to your income; so we make much larger payments to lower income families."
The advisory panel also proposed ensuring children lived in warm, dry homes by requiring a "warrant of fitness" for rental properties, a wider food in schools programme and significant changes to health, education and employment policies.
"The proposed solutions to child poverty are comprehensive, practical, cost-effective and fiscally responsible, covering both short-term actions and longer-term reforms," the group said in a statement.
Dr McIntosh, who is head of sociology at the University of Auckland, said New Zealanders were intolerant of elderly suffering but seemed to have a high tolerance for children living in poverty.
She said it was unacceptable for 270,000 children to be living in poverty and it was a cost that all New Zealanders had to bear.
Co-chair Professor Jonathan Boston, of the University of Victoria's School of Government, also proposed setting up a Child Poverty Act to establish specific measures of child poverty and require specific targets to reduce child poverty.
"Poverty harms children in multiple and significant ways, often for life. It also costs the country billions of dollars in reduced productivity and increased health care costs. We spend lots of money trying to fix the damage done instead of investing adequately up-front and avoiding those costs," he said.
Social Development Minister Paula Bennett said she welcomed the report but did not say what recommendations would be adopted.
Unicef NZ executive director Dennis McKinlay said he was encouraged that the paper proposed short-term strategies that could reasonably quickly show results.
Longer-term solutions such as a universal benefit and improving the quality and variety of health care were also viable proposals.
"If we fail the 25 per cent of children who live in poverty now, we are storing up intractable problems for the future which will have far-reaching consequences for our country's future health and prosperity," he said.
ADVISORY PANEL PROPOSALS
* Universal child payment
* "Wof" for rental properties
* Wider food-in-schools programme
