The question is are those diesel turbines still running all the time? They should keep them off and implement load shedding stage 1 at a minimum...
It is not so simple.
1 kWh hour of unserved energy costs the economy at least R75. The diesel only costs R3. It is therefore logical to pay for the diesel.
How can 1kWh hour be worth R75 or more? Simple. Take a business that uses 1kWh per hour. By not having that electricity, they lose 1 hour of productive business.