The Risks are Now So Severe that Market Psychology is the Key
This would be a rather bad time for a skeleton to fall out of a banking cupboard
The risks in the financial markets are now so large that government money on its own cannot necessarily resolve them by brute force alone - the key is to manage, and even take advantage of, the psychology of the market.
In order to achieve this, we would need to be confident that the banks do not have any gruesome skeletons that could fall out of a cupboard at a particularly inconvenient moment.