Here is demographics in action and when it say so, it is so.

http://www.telegraph.co.uk/news/worldnews/asia/japan/10918078/Ageing-population-forces-flight-cancellations-in-Japan-as-pilots-retire-en-masse.html

Japan, was in some sense was wise to seek to retain its society as homogeneously as possible.

However, its population has been on the decline.

Now this consequence has afflicted one professional sector.

Question:
Which will be the next sector to be hit?