One of the funniest things about economics is a video I saw of Lester Thurow around 1999. He was an economist at MIT. He said the economy was in a state that he did not understand.
So if he said that in 1999, why does anybody think they know what is going on now? They are talking bullsh!t and they don't know what will affect what.
What are smartphones and the Internet doing to the economy. Nobody knows. They didn't exist in 1999. John Maynard Keynes didn't know anything about the effects of this speed of communication.