I'm guessing you don't actually pay attention to the tax law, then. Annual vehicle registration (aka, a vehicle ownership tax) is more expensive as the weight on the vehicle goes up. Vehicles over a certain weight limit require more complex and strict drivers license classes (granted, class B starts at 26,001 lbs which is way higher than even today's heaviest consumer cars), and any vehicle used for work has higher insurance and regulatory costs, regardless of the size.

Buying an F350 (a truck that really only has a place in very specific situations anyway) requires so much extra work and almost always requires a class B license because of the kind of work being done with it. People who choose to get something like that because of small-dick syndrome are idiots. And that's coming from a person who used to drive 18-wheelers and still has a compact SUV as my daily driver.