What this means in practice
Two roles can face the same automation pressure with very different human stakes. Wage vulnerability captures the difference: a worker earning near the wage floor with interchangeable skills has little cushion when hours or headcount are cut.
Fast Food and Counter Workers and Home Health Aides both carry high wage vulnerability — large workforces, low median wages, thin bargaining power — even though their automation exposure differs sharply. The metric pushes transition planning toward wage preservation, not just task safety.