Some background is needed first:  After the return of the exiles beginning in 1990, powerful figures such as Thabo Mbeki and Joe Slovo got black people in South Africa to accept a crucial reduction in the political power previously held by white voters from the time of the constitution of the Union of South Africa in 1910. 

In his article "Reform lethal slate politics", (2016 ) Trewhela explains just how this occurred: @ http://www.politicsweb.co.za/opinion/reform-lethal-slate-politics

This was the power to choose and remove each individual MP and provincial councillor for themselves, organised in electoral constituencies.  The black electorate did not realise that in gaining the franchise, they were being deprived at the same time of one of its most essential qualities: the right to choose and get rid of individual political representatives directly.  Frederik van Zyl Slabbert´s (2003) report on the necessary electorial reform was never heeded by the Mbeki or Zuma administrations.