The federal government doesn't issue traffic tickets (unless you're on a military base, etc.). Moreover, think of the time necessary to go through that process - submitting documents to the Court; having a prosecutor scrutinize the filing; hire a lawyer to challenge the prosecutor? Now it's part of the public record. Personal income tax records are confidential, BTW. And if your concern is for the low-income population, how do you think they'd make out in this process? What a waste of judicial resources just to badger someone in a higher income bracket than you. (Do you imagine that a judge would want to deal this crap?) Pathological altruism run wild.
I don't see anything in here that refutes my points. You disclose your income to the government; this idea is not intended to fit specifically to the crazy US model of multi-tiered government, but even there, what is the big deal about disclosing to a state government information you already disclose to the feds?
The legal system in your country is indeed insanely inefficient; but that is not a problem with this particular proposal, it is a more general problem with your legal system.
How do you think the 'low income population' would make out in this process? What is it that you imagine would make this worse for them than for any other offender?
This system is currently in effect in Finland; so it is demonstrably not impossible to implement. As far as I can tell, the Finns are very happy with it.