As another comment said, this is a sequel to "Human Race".
In "Human Race" he says that he is sick of being an human, now here he says that he wishes he could feel something, because now he's a machine. When you're a machine, you don't have the "highs and lows of living", that's because you don't feel anything.
"I wish I knew what it was like, to care about what's right or wrong" that talks about the mind of the ones who lost their humanity, who don't actually care about nothing, and just do their work.