Cash for Clunkers rule, does this make sense?

:confused:This makes no sense to me. The enivronment gets more bang for its buck if Category 3 vehicles were traded in for Category 1 vehicles. I have a category 3 (ford e350 extended van) and wanted a small suv (hyundai santa fe) which is a category 1, but the rules dont allow it. Why would they have this restriction on it?

The point of cash for clunkers, you trade a clunker for a car the gets better MPG, check if hyundia does the program or maybe the car you picked out is not fuel efficient enough.