Currently half way through a 5 year retirement bulge which is seeing approx 200 pilots a year going. Some ARE taking the money and running, others as WWW said are going to the low costs on cushy deals. I know one 55year old 737 capt who retired from BA one day and next day went to easy with a fat golden hello and a part time training captain deal.
Also don't forget that after retirement bulges happen you get years of seniority stagnation.
So sorry to be the bringer of bad news, but those of us with our foot in the door need those retirees to go just so we can keep our jobs.