Lyric discussion by youthinkyourejohnlennon 

seems like the whole album is a conflict between your heart and reason. The hidden track sounds very robotic in terms of the vocals...very droning too. maybe the brain won over the heart? that would be a shame...

I think the hidden track is a contrast. You've got the monotonous, robotic vocal parts singing "we're all marionettes"; but there's also the melodic choir - which could represent the heart, asking the brain who's really pulling the strings.