How many Labour MPs are fleeing overseas

I blogged yesterday about how Dover Samuels was heading overseas once he leaves Parliament.  Now I have been reminded that Marian Hobbs is off to the UK to teach, once she is off.  And it is widely rumoured Tim Barnett will also be heading to the UK.

So with around 12 Labour MPs retiring, as many as 25% of them will be fleeing NZ.  Is it any surprise so many other NZers are doing the same?