_You_ don't. Others do: https://en.wikipedia.org/wiki/Day-fine https://en.wikipedia.org/wiki/Day-fine Specifically, that's based on (aggregate) income, not net

_You_ don't. Others do: https://en.wikipedia.org/wiki/Day-fine https://en.wikipedia.org/wiki/Day-fine Specifically, that's based on (aggregate) income, not net worth, but it still intends to be more proportionate to avoid making crimes legal for rich people. There was actually a recent case in Germany of a wealthy man taking to court over a traffic violation fine, the fine being upheld in court and subsequently corrected to a much larger fine because the original fine was based on a much lower estimate of his income and by challenging it he had to reveal his actual income. Of course the problem with linear scales like this is that wealth doesn't scale linearly (e.g. the practical difference between an income of $10k and $0 is much greater than between $10k and $20k) but it still seems more reasonable than "punishing based on the impact" alone if it is after all intended to be a punishment (and it clearly is, otherwise we wouldn't have prisons).