A Hangzhou charter for fair growth and responsible capitalism would give the G20 Leaders Summit a much-needed sense of purpose, according to an economist with a London think tank.

The summit sees government leaders and central bankers from the world's largest economies meet to exchange views on economic policy.

Alan Wheatley, associate fellow for international economics at Chatham House, said one of the key ingredients to push for a new round of world economic prosperity is to increase the share of global income that goes to workers rather than to companies.