&gt; Keynesian responses which are never quite robust enough to do the job they&#x27;re intended to do<p>How much of &quot;normal&quot; GDP should you spend in a crisis in order to avert it?  5%?  10%?  20%?  50%?  100%?  500%?  I&#x27;ve never heard a solid answer, mostly just &quot;however much we spent wasn&#x27;t enough&quot; which seems a little tautological.<p>The only reason I&#x27;m picking on you is you said &quot;never quite robust enough&quot; as though you just plug a number into a formula and get an answer.