Money for Floods Lyrics

Lyric discussion by tinustijger 

Cover art for Money for Floods lyrics by Joan Baez

I've been wondering about this song. It is unavoidable that rivers flow, and that once in a while there's a flood. The government doesn't spend money on preventing floods, but they always find money once they're there. What does this have to do with Eliza? Her belly 'floods' and she is starting to feel that this flood never ends: she's in over her head. But what does the government have to do with this? What's the link between the floods?