Earlier quoted context omitted.
I like the % of income idea.
I like it simply because screwing the rich and middle as hard as the poors on trivial issues is gonna make it real clear real quick how excessive penalties for common civil offenses are and pretty soon thereafter the laws will change. HN has this fantasy of $10k speeding tickets. In reality it's gonna look like 100mph speed limits, $100 fines for you and $10 fines for your nanny.
Where I live, that's what you pay when you drive 10mph too fast.