So you reckon that an airline couldn't find Pilots, Engineers, Cabin Crew quickly ?
Firsty, the pilots aren't involved in this, they've their own union and pension fund.
Secondly, no I don't think all the engineers could be replaced in 14 days, there's a massive global shortage of rated Aircraft engineers. It's next to impossible to get one at the minute, never mind an entire team of over 200 of them. And then to train them up and get them registered with the IAA? Not a snowballs chance in hell could that happen in 14 days. Even if you manage to poach an entire team of engineers from another airline, it's gonna take a number of months, and it's going to cost you so much, you may as well just close the doors to begin with. Also bear in mind Garda clearence takes about 6-7 weeks to come through, if you've got 3000 people waiting to get cleared, it's going to take the best part of a year.
Cabin Crew could be replaced quickly enough, but 14 days is too soon, they'd also need to be trained in doing it Aer Lingus's way.
And how exactly does Aer Lingus find all these people when their entire office staff has been fired? Is the board of directors going to go through and find 3000 suitably qualified people themselves? Who'll set up all the records and payment processes for these new staff. Who'll show them how to use the custom designed systems that Aer Lingus use?
While on paper you might be able to say it's an option, long story short, firing all staff is not an option for Aer Lingus.