Most people spend ridiculous amounts of money on stuff they don't need. If they really need to drive then stop spending money on those other things.
That's a great idea and all, but people have already stopped spending money on those other things. This decrease in consumer spending is why the dollar continues to devalue, pushing us into a recession, and raising gas, food, and consumer good prices even more.
The Earth is the cradle of mankind, but one cannot live in the cradle forever. -Konstantin Tsiolkovsky