Using logic with the flu crisis, but not the economic crisis?

Homeland Security Secretary Janet Napolitano defended her decision not to close the borders with Mexico, saying it “would be a very, very heavy cost for what epidemiologists tell us would be marginal benefit.”

Where was this logic with the handling of the economic crisis? That approach has really just been “spend as much as possible, as quickly as possible, without waiting to assess the benefit.” I always thought people working with numbers were supposed to be the most logical. And in a time when we are at the cusp of an epidemic with the “swine” or “Mexico” flu, I am more likely to accept questionable and conservatively irrational decisions.

I guess, something about reading that quote just got me thinking.