A vast part of SA's "economy" is informal and illegal. Generally comprising individuals stealing and selling on goods.
Coal, timber, electricity, water, diesel. Etc. Etc. Etc. The less easy it is to trace the better. And then bribes... everywhere. Counterfeiting documents (well actual real documents often enough, but manufactured by the people supposed to oversea such processes) for bribes.
This is so huge in SA it boggles the mind. Making everything more expensive for everybody. Worsening the problem.