I can’t believe how the same blog post is basically exactly relevant, word for word, 3 years later.
Eskom produces electricity for the country and makes a profit or a loss doing so. This profit or loss goes back into treasury, which, inefficiencies aside, belongs collectively to the citizens of South Africa.
If prices are too low and Eskom makes a loss, this shortfall must be made up through higher taxes or lower government spending. If Eskom is not given additional capital, it will have to stop buying coal and stop investing in new infrastructure.