Bottom line, whenever people are chosen for any role on the basis of anything other than their ability, performance will inevitably deteriorate. And when this is applied systemically and iteratively in any organisation the effect will gradually snowball as institutional memory decays, and the preceding incompetent placements bring even more incompetents into the organisation.
This is simple, irrefutable logic. A child can understand it.
The fundamental conflict, then, is that in order to address poverty we need a prosperous and rapidly growing private sector and efficient government that supports free market principles and encourages economic growth. But we're taking the short term approach of addressing poverty by shoehorning unsuitable people into positions and increasingly regulating all aspects of the economy, measures that can only result in a declining private sector and useless public sector. The results are plain to see.
I honestly believe most politicians know this at some level, however, the crux of the issue is that they know that they will not last long at the trough if they attempt to change this status quo since the vast majority of the electorate seems hell bent on immediate transformation today at any cost, with no glimmer of understanding of the long term consequence for future generations. So the real question is, what can be done to make them to change their stance? If the answer is "nothing", then the future is very bleak for South Africa.