Is the GM employee discount really the bottom line?

My assertion is that if you haggle to the point the dealership is not making any money on the front end and is a break even there is a chance that salesman didn’t make any money for their services of helping said customer, some salesmen are only paid on the front end gross not holdback, warranties, accessories etc. If its a new guy they for sure aren’t making money on CSI and misc money from GM. I never said that the dealership doesn’t make money there’s a lot of ways a dealership can make money. It’s just food for thought when you’re trying to get the best deal.