Fines in Germany usually follow the "Tagessatz", which is the income of a day, as calculated based on your tax records (and other information). So you might be sentenced to pay 90 'daily incomes', which hits a poor person as badly as it does hit a rich person.
Also note that there is a minimum amount of income that you always will be granted access to ('Pfändungsfreigrenze'), so a fine will not make you die from hunger nor make you homeless.
True in principle, but afaik the income is usually estimated
(it is not measured precisely) a lot lower than its true value for wealthy persons. Still a better idea better than fixed fine amounts, of course.
people scraping on their salary are hit very hard by fines defined by "Tagessätze".
But once someone is "poor enough" to hit the limit or anyway living on welfare they are very ineffective.
Also note that there is a minimum amount of income that you always will be granted access to ('Pfändungsfreigrenze'), so a fine will not make you die from hunger nor make you homeless.