Earlier quoted context omitted.
Finland, I believe, scales fines proportionally to your income. Not perfect (the rich can more easily hide their income than the not so rich), but a good start.
The problem isn’t so much that the rich can hide their income more easily, it‘s that the value of money doesn’t increase linearly. The more money you have available, the less valuable any additional unit of money is to you and the less it hurts if money is taken away from you. Proportional fines help, but they aren’t perfectly fair.
There are people who just park their car anywhere and paid parking tickets, they really don't care because it was too small amount of money.
If anything, people should realise the level of inequality has become. How unfair and unjust the system has made against the bottom half of the population.