It is one of the reasons it is subject to considerably more regulation and oversight, although clearly the experience of the past few years indicates that in many parts of the world the oversight and regulation were deficient. When the finance sector stops functioning properly it has knock on effects to all parts of the economy in a way that other sectors generally don’t.
The experience at the end of 2008 following the collapse of Lehman Brothers demonstrated this point starkly. The contraction in the global economy was breathtaking in its rapidity, but also in its simultaneity, in a way that hadn’t been seen before.