Elvis,
Thank you for your feedback!
Actually, I intended the point of view to be the E train Wall Street commuter, he sees a homeless man who he mentally dubs "Homer", imagines the life of the homeless man, and compares it to his own life. That's why the first line is "I saw Homer on the E train". All of the references to "I" e.g. I feel like a one-eyed monster, refer to the narrator, totally straightforward.
It actually doesn't make sense that the Homer character is speaking the two verses you refer to (and he said)...if nothing else, that character doesn't have the concern that money is a thing that he saves.
That said, most of the imagery and story is about the Homer character, so I absolutely understand why the listener might think it's all about the Homer character. This song is multi-layered and complicated - maybe too complicated. :-)
Best regards,
Mike