Couponing for groceries is a pain in the ass, so enough people don't bother to do it, and that makes for a stable balance of people paying too much and people p

Couponing for groceries is a pain in the ass, so enough people don't bother to do it, and that makes for a stable balance of people paying too much and people paying too little. With something as high value and infrequently purchased as a vehicle, finding a coupon in a separate venue is something almost everyone would do if they knew about it, and so it wouldn't achieve the necessary balance. Whatever the tactic is (haggling, couponing, who knows what they'll think of next) it has to be a sufficient pain in the ass for this concept (letting people with extra money and no extra time subsidize the opposite) to work. Not everyone agrees with this concept (stealing from the rich to give to the poor, welfare, however you want to think of it) but at the end of the day it makes for more people being able to purchase.