Thats interesting because I noticed while watching ESCAPE FROM L.A., Snake Pliskin is negotiating with Carjack Malone for help. Snake offers her $1,000,000 which she turns down saying she already has $10,000,000 greenbacks. He tells her the 1 million is in bluebacks which upon hearing, Carjack agrees to help Pliskin.
Did bluebacks originate from some old conspiracy theory? Perhaps bluebacks is related to the UN and their use of blue?