13. The workers of a government corporation went on a mass leave because of its refusal to increase their salaries. They invoked Article XIII, Section 3 of the Constitution which provides that the State “shall guarantee the rights of all workers to self- organization, collective bargaining and negotiations, and peaceful concerted activities, including the right to strike in accordance with law[,]” as well as Section 2 of Executive Order No. 180, series of 1987, which provides that “[a]ll government employees can form, join or assist employees’ organizations of their own choosing for the furtherance and protection of their interests.” Is the mass leave lawful? Reason(s).