And yet, with the benefit of hindsight, we can see that the crucial question regarding whether or not to use fiscal stimulus was a completely different one—which is more corrosive to the legitimacy of the institutions which make the prosperity of a liberal, global economy possible: a long economic slump, or a short-term stimulus so large that it inevitably leads to spending on low-return projects or lines the pockets of government-friendly firms? We were all tying ourselves in knots working out whether the multiplier on infrastructure spending was 0.7 or 1.2 or 2.5, when what we ought to have been asking was: what course of action is most likely to avert a crisis of institutional legitimacy that will leave everyone much worse off.