The answer lies in the book by Ayn Rand called ATLAS SHRUGGED written in 1957. The opening line of this 1300 page masterpiece is "Who is John Galt?". You can discover the depth of this seemingly meaningless phrase below:
While economic conditions worsen and government agencies continue to enforce their control on successful businesses, the naive, yet weary mass of citizens are often heard reciting the new, popular street phrase, "Who is John Galt?" This sarcastic phrase is given in response to what tend to be sincere questions often imploring heavy subjects, wherein the individual can find no answer. It sarcastically means, "Don't ask important questions, because we don't have answers."
In the final section of the novel, we discover the truth about John Galt, who is leading an organized "strike" against those who use the force of law and moral guilt to confiscate the accomplishments of society's productive members. With the collapse of the nation and its rapacious government all but certain, Galt emerges to reconstruct a society that will celebrate individual achievement and enlightened self-interest.