Why do sevral of equality7-2521's fellow street sweepers cry suddenly and/or scream in the nigth? What dose their unhappines say about both human nature and conditions in this society?

The street sweepers are miserable. They get menial jobs because they had shown intelligence and aptitude. They scream and cry to be let out of a society that has forced them into mediocrity.

All is not well with our brothers. There are Fraternity 2-5503, a quiet boy with wise, kind eyes, who cry suddenly, without reason, in the midst of day or night, and their body shakes with sobs they cannot explain. There are Solidarity 9-6347, who are a bright youth, without fear in the day; but they scream in their sleep, and they scream: "Help us! Help us! Help us!" into the night, in a voice which chills our bones, but the Doctors cannot cure Solidarity.