(b) Aviation fuel and lubricants 21 800

But, rather than taking significant action, the US continued to grease the wheels of its financial sector.

In this model, the economy needs a state that eagerly lends an ear to business, and, when necessary, greases the wheels of commerce by providing incentives, subsidies, and other discretionary benefits.

And, because much of the risk is borne by banks (rather than by, say, hedge funds), which play a central role in lubricating the payments system, a sovereign debt crisis can cause widespread harm.