Then you are admitting the goal of the effort is not to stop truancy, but to punish the parents of truants who happen to be welfare recipients.
So we just let them and their parents, who are ultimately responsible for them until adulthood, continue with the status quo? Just because we cannot punish the little creeps because they are minors? Yea, that brings to mind all sorts of things that are already wrong with this country and how we as a society address, or better yet do not address, responsibility.