Dead simple. Bluebook or insured value of the vehicle being driven. Speed in a semi-truck, or lambo, expect to pay more than the guy delivering pizzas in a civic.
It’s a very good question which I presume has been solved in many places. Shares in public companies, stocks, property values etc.
If someone working two $8/h jobs to pay for rent and food has to pay $450 that has serious repercussions. If someone who owns a rental property for example is to experience an incentive of a similar size, then the incentive ought to be proportional maybe to 2-3% of the value of the property?
If we’re OK with poor people’s lives being ruined by a speeding ticket then maybe we could be OK with a millionaire having to sell some shares or even property to cover a similar offense.
And, the police would get their funding quotas faster ;)
Of course legislation like this is unlikely to cross the Gilens/Page threshold.
here’s a summary of their Princeton study finding that US “democracy” works only when serving the oligarchy: