Nobody asked but ...
A severe case of the End justifying the Means: Seize any laudable goal, then build a sand castle around it, ignoring that even the most minor chink in the foundation will evolve into a chasm. Then beat all critics with the laudability of the still distant goal until everyone is investing all resources in the eternal rescue of the sand castle. This metaphor is scalable. It fits sand castles. It fits full employment schemes, war, infrastructure, the state, empires.