Think about it
There would suddenly be motivation to fix America's terrible infrastructure and improve public transit which in turn would:
- Reduce air pollution dramatically
- Reduce a primary source of environmentally destructive suburbanization
- Reduce a primary cause of megafauna extinction
- Reduce a primary cause of the urban heat island effect
- Eliminate the primary cause of death for children 18 and under
- Reduce the population of some of the worst human beings on earth (they all seem to love driving)
Caveats: There would need to be some exceptions for shipping, taxi drivers, etc which might be hard to enforce.
Everything would be better if I were the sole decider of who lives and who dies. Then everyone would behave.
I mean that's basically what this is, I'm just delegating enforcement to anyone who wants to pick up a gun and get to work.