It seems fairly clear to me that calling this "structural change" is somewhat of a misnomer. Structural change is when workers find jobs in expanding industries. That happens overwhelmingly during booms. For workers to lose jobs in contracting industries and to not find them in expanding industries is not "structural change" but rather something else.
If we were to pump up demand we would pump it up in expanding industries, and so accelerate rather than obstruct labor reallocation.
Could "pumping up demand" help in such a situation? Perhaps. But if the recalculation story is right, the higher demand could end up not doing much for employment. Instead, it might only do a lot to raise oil prices.