Ancient Israel had two kinds of prophets -- those who were "of the company of prophets" ("professional,"institutional) and those prophets who were NOT "of the company of prophets."  Amos, often called "the Prophet of Social Justice," reckoned himself as one of the NOTs, and thus one who was independent of human, partisan control or influence.  Today's Catholic bishops are typically too given to voicing the "party line" to qualify as OT-quality genuine prophets.  If it's Social Justice we want, the situation needs to change!  Clericalism needs to get gone!