A while ago the Minneapolis Star Tribune and other Twin Cities media had several articles on the subject of going to jail for debt. Apparently several of the judges were found to have a policy of setting bail at an amount that tended to be equal to the amount of the debt.
Here Minnetonka Minnesota Bankruptcy Lawyer David Kelly gives assurance that while many worry that this might happen to them, it tends to be rare and unlikely. The only way to wind up in jail in a debt-related case is to disobey a court order. People don't go to jail for debt, they go to jail for contempt.