If their complaint about not enough seats is regarding the fire team then it is valid, if it is about casualties, as P3 says, it is not.
Unless you have a MIRG team stationed at every SAR base, of course you are going to have to fly somewhere else to pick them up - that's a Dutch Fire Service issue not Bristow.
Since the previous contract had Dauphins without proper kit for over water night SAR for much of it, the Dutch should probably count themselves lucky.
it does seem like Bristow have stretched themselves a bit thin with aircraft though and
AFAIK the impending rear crew shortage still needs to be addressed.