A case for being selectively charitable?

In 1985, Chicago released a song called "Good For Nothing."  Vocally and instrumentally, it stands up with anything else I've heard from the band.  Lyrically, it's about someone who does favors for others, including paying for someone's bail and lawyer, but never receives a "thank you" from them.  Given the nature of the lyrics, it's surprising that the song is included on USA For Africa's "We Are The World" album.  For an album that's intended to benefit sufferers of famine, it's puzzling that there's a song on it with the chorus, "All the good that I did was for nothing."  I suppose it could be interpreted in the album's context as "Give to those who are truly needy, such as those who have nothing to eat, instead of those who won't appreciate it."  Still, the first few times I heard it, I thought the lyrics clashed with the album's objective.