The Bilderberg Group from what I have read in reliable sources such as The Guardian etc, holds meetings in secret at which new up and coming people (politicians, writers, opinion formers) are invited. People of different political persuasions are apparently invited and - as far as I can deduce from what I have read - attempts are made (not in an obviously sinister fashion but by flattery and persuasion) to draw them into this global hedgemonic thinking.
In short - anyone with any radicalism that threatens the global interests of the powerful will be destabilised. Why do you think the media are so strong against any labour leader (Kinnock, Foot, Corbyn) who appears to threaten this, whereas with a safe Bilderberg type of leader like Healey (even though he wasn't ever labour leader) or Blair weren't?