Earlier quoted context omitted.
Finland traffic tickets sounds like a horrible idea.
Why? If I'm a poor speeding Fin, then a non-scaled speeding ticket could cost me a good number of days food. If I'm a rich speeding Fin then a non-scaled ticket is just the cost to travel quickly. When you're wealthy enough fines don't matter there's no point in the police enforcing them aside from as an additional income stream.
Pigovian taxes should be constant. And if it's not pigovian, why give tickets at all?