In the United States, there are certain situations where you must pay a fine that government in the United States puts upon someone.
However, is it legal to impose a fine greater than what a person is capable of paying? Let's say a homeless man (no income, no assets) commits a felony, and must pay back a fine of $100,000. Is that legal? Most laws say that X felony/misdemeanor deserves "a maximum of $X fine, X amount of years imprisonment, or both." Anyone can serve imprisonment. Not everyone can pay a fine.
If it is, what happens when they don't pay the fine? Can the fine incrue interest? Can you declare bankruptcy on a fine?