[S]he . . . made a note to suggest that her client ease some of the last quarter's profits into tax-free bonds. Render unto Caesar, sure, she thought, but not one damn penny more than necessary.
They fear that trying to find the homeless homes translates into raising the taxes they must render unto Caesar.
Etymology
From the Holy Bible (Matthew, 22, 21): Then he said to them, “Therefore render to Caesar the things that are Caesar's, and to God the things that are God's.”