The worst paid majors are generally in the fine arts (Studio Arts, Drama) or are pre-professional degrees in lower-compensated fields (Social Work, Early Childhood Education). Social sciences and humanities do better than these.
http://content.time.com/time/specials/packages/completelist/0,29569,2073703,00.html
http://college.usatoday.com/2014/08/13/the-top-10-lowest-paying-college-majors/