Well we don't actually as company's can still require the local lingo to employ you.
And there are certain national prejudices which come into action. Western European countries will tend not to go for eastern Europeans and vice versa. There is never anything that can be done about it because of mainly the sheer volume of people who meet the criteria. You would never be able to prove that the 10 UK pilots were discriminated against when there was another 90 pilots in the pool for 2 jobs.