This is barking up the wrong tree. I mean these fines are hitting people who are too poor to pay. They should go to the rich people's tree and find stuff to find there. Illegal logging? Illegal dumping? Price gauging, illegal businesses, money laundering, illegal product importation etc.
It would be depend on what the percentage is. If it's low enough that the poor could pay it, but still substantial enough for you to not want to pay it, rich or not, it would be more effective than the current system.
Rich people steal more than poor people. Not even getting into things like wage theft, they just do, so yes, they absolutely would jump a turnstile and laugh when you tried to punish them with a non-income based fine.
He's saying the rich don't ride the subway and if they do, they buy a ticket. So a wage based scaling infringement system would be borderline useless, because you'd likely be issuing a lot of fines to the homeless and working class