The short answer is that most car salespeople don't earn a whole hell of a lot of money. Dealership salespeople average about 10 car sales per month, and earn an average of about $40k per year. If you do the math, that's about $330 per car.
Just because you want to use fewer resources and pollute less, you don't need a hybrid. In fact, there are plenty of great alternatives out there that sip fuel, cost less and provide a better driving experience than a hybrid.