What's going on? Well Switzerland is a very small country. When Swissair collapsed and thanks to the brilliant ideas from our government Swiss was created . Shortly after Swiss was born a bunch of pilots were dismissed (too big). GVA was not a base anymore, Lugano was closed, Bale was not the Crossair hub anymore and crews had to either commute to Zurich or move to Zurich.
What happened next? There is a lot of pilots unemployed and most of them are Swiss citizens and Switzerland is not part of Europe. Crossair lost more than 500 pilots (I don't remember the exact number) and Swissair a couple of them. So, do the math: ZRH GVA airports and around 700 pilots looking for a job with MD,Bus, Rj100 and S2000 ratings. And I'm not counting some "Swiss" pilots willing to have GVA homebase, thus willing to resign from "Swiss" and move back in GVA.
Hope that you've got a better picture...