GeorgeHarrison
I think it is a natural thing, the expansion has slowed considerably and will stay low during 2015 and start picking up in 2016 again. According to what I've read and heard.
My guess is that they would prefer upgrading core FOs, thus putting them on a contract instead of permanent position. That way they can keep decreasing the costs of the core, and more importantly weaken the power of the union.