If you're a millionaire, a $50 speeding ticket is barely a deterrent. If you're poor, the same $50 speeding ticket can completely break you. That doesn't feel right.
As much as I personally would dislike it, Finland's model for traffic fines is probably a more "fair" strategy.
http://www.nydailynews.com/news/world/multimillionaire-faces...
(edited for clarity)