The Swedish newspaper Svenska Dagbladet reviewed a new book on music and politics by Alf Arvidsson ("Musik och politik hör i hop" (Gidlunds 2009) in Swedish). The Newspaper list three excellent records with political music, and here they are:
Phil Ochs: "In Concert"
Charlie Haden: "Liberation Music Orchestra"
Robert Wyatt: "Nothing Can Stop Us".
I just might have to read that book.