I doubt it, and… please no. Demerit points maybe. Fines disproportionately punish the less affluent and incentivise the wrong attitude to enforcement.
One problem I've observed with uncoordinated speeds on German Autobahns is drivers who seemingly switch to their left lane without noticing a faster vehicle approaching which then has to brake suddenly which in itself is a danger to everyone. Out of anything, I feel like autonomous vehicles with coordination will make lives less stressful.
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.
That's nothing out of the ordinary. In the US the behavior is known as "rubbernecking".
Imagine that there's an accident in a single lane. The remaining lanes now have to take in all the other drivers from the accident lane, while these drivers decelerate and attempt to take the remaining lanes at speeds lower than the average speed. Yet single car cutting in line could trigger the deceleration of the entire remaining lane (like in "traffic wave" models). The cars in this lane then try to cut into another lane, and so on, such that the whole traffic is impaired. And this keeps going on for every cohort of cars reaching the accident area, producing the traffic jam.
This is my intuition of it, at least.
Worse, if you're the one in that vanishing lane, behaving in those optimum for you ways, you're the winner.
Automated driving, particularly if the automated driving lanes only obey 'safe driving speed' (not an actual limit) is the only real hope aside from a reduction in the traveling population.
Speaking of that, the best solution to this issue and that of skyrocketing prices for housing of any sort is build-baby-build (in all the cities).
I wouldn't hold my breath. After all, you are attempting to change what appears to be fundamental human behaviour, curiosity.
Reading the responses here, autonomous vehicles going in a coordinated fashion might be the only viable solution.