Here in Austin they're making noises about doing the exact same thing.
To penalize/reward individuals based upon income ventures into a whole new territory at the local level. Yes, the Feds already do this (primarily with the income tax) but we haven't really seen this before locally. I'm not counting public school taxes which is a whole other can worms.
The reason this is new territory is because it addresses behavior.
For a speeding ticket, for example, we might have a poor person paying no fine but me paying $200 for the exact same behavior. Unequal treatment under the law. And we all know how these things work, today traffic violations but tomorrow other legal violations. What about robbery? Pick any crime you choose and you'll find it on the liberal shopping list.
But don't worry they say, we have federal courts that serve as checks and balances to local authorities who may be overstepping their bounds. These are the same federal courts packed by Obama, aided and abetted by the Republican members of Congress, that we're talking about. Anyone want to take a quick look at their track record the past few years?
Fascism comes in all shapes and sizes.