The article uses Benton County, WA as an example, and states:
"Benton County collects just a fraction of all the fines and fees it's owed. But the county still collected $13 million in 2012 — making it one of the state's top revenue producers."
The county's most recent budget is over $100 million. Law enforcement in its various forms is around half of that. $13 million isn't trivial, but neither is it huge in context.
If you cut the fines, you'd have to increase tax revenue by a bit more than 10%. Again, not trivial, but not huge.
Consider that the money is already there and already being collected, it's just that you're disproportionately collecting it from poor people. Surely moving to a system that collects the money more evenly would make it easier, not harder, to obtain that money.