Originally Posted by
RedChili
Added to the above: The new staff also need to be vetted by the police before being hired. That process is usually quick if they're only citizens of the country where the airport is located. But if they're citizens of another country, they also have to be vetted by the authorities of that country, which may be a slow process.
In terms of people Arlanda is already scraping the bottom of the barrel. There are no more people to hire in Märsta either. Those people will have police records that prevent their employment.