Cool. Now I'll get Stalin-esque. Slap an enormous, annual tax on trucks,
unless an owner can show that he actually has a purpose for it, other than
"I just wanted a Dodge with a hemi so I could hang chrome accessories on
it". No trailer registered to the same owner, meaning he tows nothing? He
gets taxed. Not in a profession which actually requires a truck, like
carpenters & landscapers? He gets taxed. If a doctor decides to become a
plumber, there are ways of giving him back his surcharge in future years.
No more buying a huge truck just because every 4 years, you need to bring
home a bale of peat moss.

Get it still, you don't. Trying to accomplish this change through
governmental taxation will only result in animosity and non-compliance. Not
to mention the fact that you'd never get Congress to agree on an approach.
Accomplishing it through a high cost of ownership due to high fuel bills and
wicked depreciation will happen with Congress doing what it does
best...nothing. The market always works...eventually. Trust the force,
Luke.