I can verify the sums that hunterboy refers to. It gets even better....
We used to have quite a few Spaniards working here as flow controllers. If you leave here before you have completed 10 years you get all your pension contributions back (normally so you can buy a pension in your home country). AENA continued to pay their controllers' contributions back home, so when they left to go back home they got to keep the lot. On top of that their seniority continued to progress as if they had never left Spain.
Guess what, there are no more Spanish flow controllers here!
Those Spanish unions certainly know how to negotiate
