1. When Euro crew bases become too expensive or union demands become excessive bye bye Euro bases ( Madrid today Paris/Berlin tomorrow )
They were only able to close MAD because the government changed the legislation on redundancy in order to free up the economy. All that's happened is companies have taken a scythe to workforces in Spain. Prior to that it was virtually impossible (read very expensive) to make people redundant.
In addition MAD was horrendously expensive and not making any money. France on the other hand they make loads of it.