Granted, some will not want to return even if called back. Following a job loss, people eventually move on in one way or another. Nobody is going to put their life on hold for potentially a couple of years waiting to be recalled by whatever airline. Some will observe the situation from aside, re-evaluate their own priorities and decide to stay put in their home countries if moving to the sand pit was in their plans for the coming years. But, for many others, it will still be a desirable option for all the reasons listed in the previous posts. And many others will not discriminate between countries and companies as long as they're flying something and getting paid for it.