The South African government - like just about every other African government - is incredibly corrupt. The ANC jumped on the gravy train on 27 April 1994 and it's gaining momentum on a daily basis.
Interestingly, it was Andersen (yep, as in Enron!) that recommended to SAA's board that they should go Boeing. Unfortunately, the -800 is not a hot and high performer and they have been an absolute disaster in every way for SAA.
I am sure that if Boeing offer the right "incentives" to various government ministers (4WDs are very popular there!
) then they will get the contract ... until Airbus offer them more.
If you can't take a joke, don't come to Africa!