For those who don't know the term: it is using fines proportional to the amount of money one has available for spending on a day, as they do in Finland, where speeding tickets can go over $100,000 for the very affluent (http://www.theatlantic.com/business/archive/2015/03/finland-...)

Yes, you cannot hope to reach complete equality of the impact a fine has on the drivers, but you cannot do that with demerit points, either. A driver who needs his car to make a living will likely be affected stronger than a driver who has a decent alternative.