It's not surprising so many of these highly sought commodities are offering their skills to foreign militaries: they have had almost a pay freeze since 2010 (in real terms, a remuneration reduction of over 20% with reducing allowances), had their pensions devalued, made to work excessive hours and increasingly deployed due to a smaller pool of qualified frontline pilots (mainly due to a broken pilot training system over the last decade). These are highly talented, hard working and smart people who've put in the extra effort during their careers and now seek an opportunity to reap the rewards to compensate for being undervalued and overworked by the RAF and RN. Good for them. They won't be giving away any secrets. Just instilling safe aviation operations and teaching generic tactics.