「この死んだ女も人を騙して(だまして)生きており、生きるために悪事(あくじ)を働くのは仕方がない」という論理

The servant, out of a fierce sense of justice, seized the old woman and poured out his anger: 'What an evil deed to pluck a dead person's hair!' However, the old woman answered without fear: 'This dead woman used to live by selling snake meat pretending it was dried fish. If I do not make wigs from this hair to sell, I will starve to death. Doing evil to survive is unavoidable,' stating a cold logic of survival.