Because there are no jobs!
That will come as a surprise to the 21 cadets one airine took on last year. Most of that group didn't have time to take a breath between finishing their AQC courses and starting their airline paid Type ratings on the Monday morning. They have now been offered and accepted full time employment contracts on a seamless basis.
In addition 24 new cadets are starting type rating training (also paid by the airline) in the new year. Although that is when the warranty on my crystal ball expires, I understand the plans are to continue much in the same vein for the forseeable future.
So it isn't a case of "there are no jobs" because clearly there are! It is a case of being in the right place at the right time when those jobs arise. Timing is a very difficult thing to predict, but being in the right place has more of a skill element to it.