What does Eason Chan's song Tom, Dick and Harry mean?

This is a very sad song. Little people are working hard, just like parts on a machine. The winners are all big liars. When the flood of history comes, although the little people have eyes, mouths and hands, they can only be the first nameless skeletons to sink to the bottom of the water. It's no use trying to climb up, you can only be content and do your own little life well. Tom, Dick and Harry: Nobody works hard for others. When someone asks about the big guy, he can't remember his name. He is called Tom, Dick and Harry.