A new international report warns of the growing threats from job automation, saying that middle-class Australians are facing lower incomes or absolute poverty at some of the fastest rates in the developed world.

Ahead of an election campaign that will be dominated by appeals for equality, a report from the OECD released on Thursday said high-income earners in Australia were gaining access to a larger share of national income, leaving less for everyone else.

Between 2007 and 2015, the OECD findings stated that the share of Australian middle-income households falling into poverty in a single year was 4 per cent, which stands at double the rate of the developed world and at the same rate as Greece.