X Corp. operates a call center that received orders for pizzas on behalf of Y Corp. which operates a chain of pizza restaurants. The two companies have the same set of corporate officers. After 2 years, X Corp. dismissed its call agents for no apparent reason. The agents filed a collective suit for illegal dismissal against both X Corp. and Y Corp. based on the doctrine of piercing the veil of corporate fiction. The latter set up the defense that the agents are in the employ of X Corp. which is a separate juridical entity. Is this defense appropriate?