If this happened it would probably be in the 1960s or '70s, so unlikely that people like Mbeki or Zuma would be leading this bizarro-ANC.
Heh. I'm trying to imagine the 1960s ANC having the infrastructure to enslave the entire white population.
ANC: Okay, whites, either you all report for the slave-auction tomorrow, or we BLOW UP ANOTHER POWER LINE!!
WHITES: Oh God, no! Anything but that!! Okay, okay, where do we sign up for the shackles?