If the spanish ATCOs are so unhappy about the working conditions as they claim to be there is not much left. Organize a strike, sick out or similar stuff or simply vote with your feet. With the salary you enjoyed in the last few years you all should have more than enough savings to survive a couple years while you can search for better jobs elsewhere. Of course that would lead to more short-term mayhem, but then there is a chance that spain might at some point get a 1st world ATC service and not the 3rd world one at double 1st world salaries they had until now.