Presumably there's some level at which this can be solved in a purely monetary way.
If the average Dodge Ram causes X millimorts of deaths per year (per km? per km on suburban roads?) and every dollar spent on public healthcare (drug interventions? road safety? Fire departments?) saves Y lives, you can increase the tax by X/Y, trust the government to spend the extra revenue in the most effective way, and everyone comes out better off.
A skilled surgeon can generate millions of negative micromorts per year. Should they get a pass if once a year they push a child off the roof of the hospital? What of the classic example of killing a healthy patient and saving several lives with their organs?
It sounds so enlightened to shuffle micromorts around. What good is it to the parents of a child killed by an unsafe vehicle that increased taxes going to healthcare will ensure that 320 elderly people can live 3 months longer?
If the average Dodge Ram causes X millimorts of deaths per year (per km? per km on suburban roads?) and every dollar spent on public healthcare (drug interventions? road safety? Fire departments?) saves Y lives, you can increase the tax by X/Y, trust the government to spend the extra revenue in the most effective way, and everyone comes out better off.