The discount isn't that great. The effective result of the discount is that you are basically even when you drive the car off the lot (wheras you'd be $1k-$2k in the hole otherwise).
You also have to pay taxes on the discount. That's right, it's considered a taxable benefit.
The typical discount that I have seen for employees and supplier employees can be twice what the general consumer can get. That's an additional $1500 or more on many cars.
If that benefit is being taxed, then you have a problem with the government. The manufacturer isn't responsible for the tax consequences.
www.pafairtax.org