What makes you think the workers downstream from him are not among the starving and homeless?

Because RoyaltyInTraining made that statement without referring to any additional information? So I obviously assume that he made his statement based on the information in the post.

Besides, even if they were, would donating the money be less effective than paying them in wages? Charitable donations are tax exempt, wages are not. Also, you assume he was in a position where he could do anything about the worker wages, which seems unlikely given how most companies work (wiki says he was not a full owner, just co-founder).