Well, I learned something... It is done in Finland and Switzerland, Belgium is looking into it.Not everywhere….
Did you know getting a speeding ticket in Finland can either be very expensive or very cheap?www.euronews.com
European countries are increasingly pegging speeding fines to income as a way to punish wealthy scofflaws who would otherwise ignore tickets.www.nbcnews.com
Now of course based on wealth would be completely impossible here. See the cases with government officials with huge amounts of cash.
But in a country like this a percentage of the original value of the car, added to the fine, might make sense. At least then it hurts a bit.
So in case of 0.5%: if you can afford a 1 billion rupiah car, you would get an additional $350 amount on the fine. With a Lambo, Rolls or Ferrari count on $5,000. And with a regular Avanza or so, it would be $100.
No chance in France, as it would be against the basic rule "all citizens are equal in front of the law"
Personally I completely disagree with such the Swiss / Fin system. It opens the way to possible applications in other fields, and anti democratic IMO.