As [Shimer College student Dorian Electra's] lyrics lay out, the greatest danger of excessive money creation is that it discoordinates the activities of savers and lenders. Interest rates in market economies serve to signal to producers how patient or impatient the public is. When people save more, rates go down and producers know they can borrow more and take their time in producing things. When saving falls, rates rise and the opposite message gets sent. As the song illustrates, interest rates are like traffic lights that coordinate behavior at intersections.