The Civil Society 20 group, or C-20, says the G-20 summit this weekend in Brisbane, Australia will be judged on fairness.
To that end, it wants the summit of leaders from the world's 20 largest economies to match a commitment to boost GDP by an extra USD 2 trillion over five years with a plan to ensure that the poorest 20 percent of households benefit most.
The problems of inequitable economic growth have often been submerged by other items on the G-20 agenda. But the inclusion of the word "inequality" in the communique from the last leaders' summit held in St Petersburg, Russia in September 2013 was seen by some as a breakthrough.
The World Bank and International Monetary Fund both say living standards suffer when a minority is capturing an increasing share of wealth.
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C-20 Chairman Tim Costello says his group, which was set up for community organizations to engage with G-20 governments, is looking for an outcome on Sunday that takes measurable action to reduce inequality and address climate change.
Costello says that reducing inequality in Australia conflicts with Prime Minister Tony Abbott's domestic austerity policies that include reducing unemployment benefits for young Australians.