The NSW government has been challenged to show the same commitment to Sydney's west as it has shown to the inner-city development of Barangaroo in order to meet a jobs shortfall in the outer suburbs.
Essential Economics research shows 120,000 jobs must be created in Sydney's northwest and southwest over the next 15 years to keep pace with projected population growth in those areas.
Peter O'Neill, from the Urban Research Centre at the University of western Sydney, says such job growth is the equivalent of "five Barangaroos" - referring to a project that will create an estimated 23,000 CBD jobs when completed.
"You need coordinated effort between all levels of government and private sector investors to create that number of jobs," Prof O'Neill said on Thursday.
Prof O'Neill said it was "puzzling" the NSW government accepted the importance of playing a direct role in Barangaroo, yet assumed that "five times this jobs growth can take place out west with hardly any government effort whatsoever".
He was speaking at a meeting of the National Growth Areas Alliance (NGAA), which is calling for greater investment in outer growth suburbs across Australia.
NGAA chairman Paul Pisasale said, in addition to jobs, it was essential that outer suburban growth areas could provide vital infrastructure, such as education, transport and social services.
"A lack of investment in these facilities affects Australia's social and economic health, and has a direct impact on the physical and mental health of residents in these areas," he said.
Mr Pisasale, who is mayor of the southeast Queensland city of Ipswich, said the NGAA would be seeking the federal government's partnership to address issues in the country's outer suburbs.