3. Lexi Enterprises always made sure that the salary of its supervisory employees is 70% higher than the wage of its rank-and-file workers. Later, the management of Lexi Enterprises realized that its business is highly dependent on rank-and-file workers because they spend more time in providing services to the clients. Thus, Lexi Enterprises significantly increased the wages of its rank-and-file workers such that they are only 10% behind the salary of the supervisory employees. Consequently, the supervisory employees demanded an increase in their salaries and alleged that Lexi Enterprises must correct the wage distortion. May the supervisory employees validly demand an increase in their salaries? Explain.