In my experience (42 years Aircrew and ATCO), ATCOs just had to play the safety card to frighten management. Spain's ATCOs were always the envy of Europe as they were the best paid, were scheduled to be on duty the least number of hours (note: Not "worked"), retired the earliest (52 on 100% pension until 65) and the name "Spanish practices", originated where?
Spain is in the S**t. Everyone has to bear the burden of the current crisis and I am afraid the Spanish controllers are not excluded.
Shame on this ATCO for a most unprofessional comment. I would fire him on the spot.