Not as much as poor people, sure, but keep in mind that even rich people are much less powerful than governments or even large amounts of people.
I mean, obviously a completely different scenario, but, how many times have revolutions killed all the rich/powerful people? They don't have infinite protection just cause they're rich.
I'm from a country where that happened, I'm quite aware about this aspect. Even so, fining rich people more just makes sense, to me. Fines are supposed to be a deterrent.
If we're reaching the point where we're discussing about revolutions and civil forfeiture, I think there's a bigger problem here. And it's not proportional fines.
I mean, obviously a completely different scenario, but, how many times have revolutions killed all the rich/powerful people? They don't have infinite protection just cause they're rich.