If gas tanks were money, and you are worth $100K, let's say your car has a 20 gallon gas tank, a billionaire would have a 200,000 gallon gas tank. Think of these terrifs as something that harms "gas mileage". The guy with a 200,000 gallon tank may care, but realistically poor gas mileage is never going to effect their quality of life like it will us regular folks.