Master of Puppets

Having listened to a bit of old Metallica today I noticed how well this song fits in with our current predicament, inparticular:

"Master, Master, where's the dreams that I've been after?
Master, Master, you promised only lies
Laughter, laughter, all I hear or see is laughter
Laughter, laughter, laughing at my cries
Fix me!"

"Master of Puppets I'm pulling your strings
Twisting your mind, smashing your dreams
Blinded by me, you can't see a thing
Just call my name, 'cause I'll hear you scream"

So who is is the true "Master of Puppets"? Kean? Mrs Desai? Balaji? Jerome Anderson?