Brazil wants the world's largest economies to agree so that the richest pay more taxes. Oxfam estimates that if a 5% rate were applied to the wealth of G-20 billionaires and billionaires, up to $1.5 trillion a year could be raised.

In Brazil, France, Italy, the United Kingdom and the United States, the super-rich pay proportionally less taxes than the average worker, Oxfam says. Brazil took advantage of bilateral meetings to close an agreement with the Inter-American Development Bank (IDB)