I keep hearing that there is not enough of some specialists in economy which is followed by some number. Here's an example:
Economy needs 300,000 digital workers by 2020 to reach full potential
How is this derived? Is it reasonable?
Job market is regulated by supply and demand. To follow the example of "digital worker" - I believe that many, for example, engineers could change their job profile to become "digital workers", but in that case engineers would be suddenly in higher demand as well.
We can say that janitor contributes x to GDP and database administrator contributes y and because y > x, we need more db administrators than janitors, but in reality we need exactly the current number of janitors given their market price and we need exactly the current number of database administrators given their market price.
Also I can think of a question "How many digital workers do we need to inject into economy by 2020 so that the number of digital workers on the market in 2021 will be the same as in 2020?" and the answer could be 300 000. But how to calculate it without being simplistic?
To reiterate: what does it mean that we need x new professionals and how to calculate it?