I have no ideological aversion to defences of Liz Truss. We all have our foibles, after all. But the one argument I won't accept is that, in going gung-ho for growth, she at least identified the right problem. I mean, pointing out that the British economy has been in a decade-and-a-half-long torpor and suggesting we ought to fix it ≠ penetrating analysis or a programme for government.