"... what else can they do to avoid the Mother, Father and Great...

"... what else can they do to avoid the Mother, Father and Great Grandfather of all Depressions?"

The best thing to fix a depression is to have a depression. Take your medicine, reset back to zero and then move on quickly as in 1930.

More debt, QE call it what you like is only putting off the inevitable to a future date whereby the problem only becomes much worse. Death by a thousand cuts springs to mind.