I think if it scales to a maximum amount its fine especially for driving related violations. For example nobody needs to be paying 25 grand for a speeding violation thats absurd regardless of income. But its interesting. I believe in Mexico its based on your hourly wage and x amount of hours. So if you have no job and you get a ticket you owe nothing, at least thats how it was when my sister got a ticket in Guadalajara in '07.