Instead of a specific fine for a crime, the fine should be a percentage of a person's wealth.

well lets follow this train of thought. the department wants funding, they plan to steal it from the people anytime they break the law via fines. this is why departments have quotas ALREADY instituted that incentivize tickets by affecting your performance review. so the inevitable outcome is them extracting funding from the citizens in order to fund their organization. if youre suggesting this be completely abolished, i agree 100%. if youre suggesting that somehow it would cause more problems than it solved by targeting the rich instead of poor people, then its obvious you have no idea what its like to be poor or what poorer communities experience - the cycle of harm you mention is already present in their lives, thats why the community is poor. even if a millionaire is fined hundreds of thousands of dollars, their quality of life is largely unaffected by the fine. for a poor person, the same fine represents a very large percentage of their income. someone in another comment mentioned that finland scales their tickets by income ONLY when it exceeds an excessive amount, so your argument of "people going 1mph over being targeted" becomes even less valid because someone would need to speed excessively for their yearly income to be factored in. ​ TL;DR if the police are gonna steal money from lawbreakers either way then it should be from the ones who can afford to pay.