Answer: It means that you should connect and thus earn the upper world.
It is actually when we connect with one another into one whole that we can draw the upper Light which was not between us before.
Suddenly, the upper abundance descends upon us when we unite. A great illumination, a brightness, a sense of elation, an understanding, a feeling spreads among us. This is called “Go make a living off each other” because when we connect, we actually earn what cannot be earned any other way.
From the Kabbalah Lesson in Russian 4/3/16