New Caledonia's anti-independence Future with Confidence coalition has warned of the worst economic crisis in 40 years.
The party said New Caledonia is at risk of big job losses as it now faces an urgent economic and social situation, with the possibility of the public health care system defaulting.
It said this requires a consensus to bring about the necessary reforms, suggesting talks with the pro-independence FLNKS and the newly formed Pacific Awakening party which holds the balance of power.
The call for a truly collegial government comes after the surprise election of a pro-independence politician Roch Wamytan as Congress president last week.
A new government is due to be elected by the Congress by mid-June, with pro-French parties fearing the formation of the first ever pro-independence government.
Future with Confidence said the new government will have to find quick and lasting solutions which can only be achieved under a politically balanced government.
The Pacific Awakening has tried to downplay its standing as kingmaker and instead said its role is that of a democracy maker.