The problem is that there is no absolute objective way to determine if someone is able to pay. For example, the court may rule that a person is working reduced

The problem is that there is no absolute objective way to determine if someone is able to pay. For example, the court may rule that a person is working reduced wages so they do not have to pay as much, and thus they are required to get a better job. I read of a few cases where this happened in regards to child support during the economic downturn with the court not correctly judging the ability of a person to get a new job at the same level as a previous job they held.