The windmill is Soviet industrialization: announced as liberation, pursued through famine and ration cuts, destroyed, rebuilt, its failures attributed to wreckers. Boxer's death is literally the cost overrun made flesh. When finished, it grinds corn for money, not electricity for stalls: the plan achieved, the promise inverted.
The generic reading: every grand national project, dam, railway, olympiad, borrows against the present to pay a future that sends the invoice elsewhere. 'Windmill thinking' names the moment sacrifice becomes the point and benefit becomes optional.
The last turn: the windmill never needed to work. Its function was to occupy: exhausted animals cannot count commandments. Perpetual construction as perpetual control, the project that must never finish because finishing would release the workforce into thought.
What is a nation's grand project if not a windmill, and who checks whose corn it grinds?