The head of South Africa’s anti-graft watchdog is open to talks on her recommendation to change the central bank’s mandate, a proposal that has drawn sharp criticism from parliament, the ruling party and investors, a local news agency said on Saturday. Public Protector Busi Mkhwebane’s recommendation to alter the South African Reserve Bank’s principal constitutional mandate of maintaining currency and price stability to focus on economic growth has highlighted worsening divisions between the country’s state institutions. Both the central bank…