We don't asses penalties in this country based on the resources of the perpetrator. All are equal before the law (at least that is the aspiration. we obviously fall short in many instances.).
And besides, your idea is non sensical. We should confiscate their property knowing that they have the resources to get it back in order to induce some higher lawyer fees and a pain-in-the-ass factor as some kind of penalty increase? That's bizarre! That's not how government should work at all! It ends up being a waste of time and resources for a lot of people and, as you mention, draws in innocent 3rd parties who end up taking some of the heat.
If we actually wanted a higher penalty for richer people than there should just be a bigger fine or late fee.
