Master and servant Я твой слуга, я твой работник

Every geek like to listen Kraftwerk music, and this is my look on the lyrics of Kraftwerk song The Robots from The Man Machine album that was released in 1978. Я твой слуга, я твой работник - every meloman know this Russian phrase from Kraftwerk masterpiece song. No need to translate this famous words. Who is master and who is servant on this picture? That is the question