"Chain Gang" - Sam Cooke
and what do you suppose is the message in the song?

obviously, life is diffucult, and it's something that you see everywhere. people singing it in the streets, while they work, at home, just over and over again.
That's the sound of the men,
Working on the chain, gang

these people are stuck together, just part of a machine, and sometimes it gets tiring. 

but:

I'm going home one of these days
I'm going home, see my woman
Whom I love so dear
But meanwhile I gotta work right here

there is hope. the people in this 'chain gang' all have something to look forward to, whether it is a person, a home, or something. in life, there will be work and hardships, but there will also be a time to rest.