Common sense is not much use in a financial panic.
To be blunt, credit is successfully reestablished when financial elites say, "When." Credit is close to a synonym for the mood of the ruling class. To say an economy is based on credit is to say it is based on animal mysteries. Glamour, prestige, élan, sprezzatura, cutting a figure ... that is what the economy is made of. It is a rather terrifying thought.