It's wrong to expect kids to pay for things.
Rick is driving back home with his son who wants to stop to get fast food as a treat.
Rick wants to teach his son responsibility.
Rick gets his son the fast food under the condition that he gets an A on an upcoming test.
Rick stops to get fast food but makes his son use his allowance to buy his own food.
The son is encouraged to keep his grades up in school to get rewards.
The son will feel like his father is not being fair.