G20 finance ministers are expected to take a first step towards international cooperation on taxing the super-rich Friday, with a deal in Brazil likely to call for individual nations to strengthen their own measures, rather than delivering a set of unified regulations.
The initiative is a key priority for Brazil's leftist president Luiz Inacio Lula da Silva, who this year heads the G20 grouping that includes the world's major economies, the European Union and the African Union.
