This song is like town/city drama. Someone's having a baby they know they cant feed, gossip, breakups, breakdowns, etc. and the "They eat off of you, you're a vegetable" line was saying basically they feed off of your chaotic energy, eating off of you like a vegetable
This is not hard to understand whatsoever. I do think it is all about interpretation, I think you're a vegetable mint.As you're laying there, you're dead.You are silent, You are blind to what is going on in the world or cities and wake up. Btw The song was written and composed demo for off the wall between 78-79'