Cab Driver assaulted by Toll Booth officials!

I am genuinely still shook by what just happened. I am taking an Uber from Gurgaon to Delhi and on the NH8 where the cabs are supposed to pay tax, he went on the road where regular cars drive (intentionally? I don’t know). Then he instantly noticed toll booth officials standing in front catching people. He took a sharp left to change the lane and go towards the toll line during which a bike almost hit the car. The bikers got down to confront him. The toll booth officials ran towards the car, started banging on the door loudly. The moment driver uncle (late 40s man) opened the car door, they came inside and started slapping him. One after another, atleast 10 times. He kept saying sorry, galti se hogya, sorry. They did not listen. Two of them slapped him brutally and kept saying “500rs nikaal ab”. I was just numb and looking at the entire scene. They started shouting at me ki “kaisee cab main betho ho driver dekh ke betha karro”. I was just quiet. He took out 500 from his wallet, other dude slapped him hard from the window and the note fell in the back. I picked it up and quietly gave it to the toll booth official. I have never seen such intense violence up close. I feel bad for Uncle. He just kept fixing his hair and saying sorry. My fare is 500rs. I think I will give him 500 more? I don’t know. What do you guys think? Merko pta hai unhone galat kiya rule todke but aise ittna ganda kaun maarta hai, I feel really bad for him as well.