okay so right there...what do you mean "cash disappears"?
On cash disappearing, numbers of authorized borrowers have fallen too much. Many are either defaulting or avoiding new loans. High credit scores are needed for borrowing and for getting good jobs. Banks, other groups and individuals are also hoarding cash (money, gold, deposit banking instead of investment banking and so on).
In short, too many are afraid to invest in many of the kinds of projects that produce real wealth—things that we use.
When the economy tanks and unemployment goes WAY up.