Bus drivers are making extra cash from passengers with no tickets

We left Mthatha greyhound offices at 16:15. When we got to Bloemfontein the bus made a stop at Bloemfontein station and dropped a number of people. When we got onto the N2, it stopped at engen garage and the driver gave us 10 minutes. We sat at engen for about an hour. We heard the driver making a call to someone telling him he's waiting for him. A number of people kept coming into the bus, I then went to enquire what was happening. I realised that the people getting into the bus were from a taxi, they had no tickets. The driver was given some money by the taxi driver. Greyhound is a joke