I remember that in the netherlands when the first unions were formed, there was an Union of workers, wich was back then revolutionairy, and as a reaction to that the Catholic conservative politicians started a Union for Workers, which was in fact reactionairy, and not designed as an organisation for action but rather one of top-down 'caregiving'
Whenever 'realism' is posed as antithesis to idealism, disasters are bound to happen.
Gobierno Negrín: ¿dónde está Nin? - POUM (Partit Obrer d'Unificació Marxista)