You'd have a point Mir, if it weren't for the fact that Spanish ATC have had some extremely attractive working conditions over the past years. Twelve hundred working hours max per year and anything above that had to be paid via extra-hours. Annual salaries starting at € 170,000 could easily be increased to € 400,000 per year. Every single time the government which just happened to be in charge tried to change those conditions, they'd go on strike.
"Of 2,300 controllers, ten were paid between €810,000 (£725,000) and €900,000 last year. A further 226 were paid between €450,000 and €540,000 and 701 were paid between €270,000 and €360,000."
[Source]
Then no one heard them complain about workload nor passenger safety.