I suspect that what you’re seeing is more of an age effect: young men tend to be aggressive drivers, including the rich ones, and by the time they’ve matured in

I suspect that what you’re seeing is more of an age effect: young men tend to be aggressive drivers, including the rich ones, and by the time they’ve matured into better drivers they are also likely to be better off. One other confound to consider is safety features: more expensive vehicles tend to have features which can prevent or reduce fatalities no matter who is driving.