At the end of the day the only way the pay and conditions for the LEPs will change is if lots leave or no-one joins. So if all the LEPs got trained up, got some experience and then quit for greener pastures, the company would have to change the LEP pay and conditions. Until that happens, nothing will change.
What happened when B scale was introduced, a deluge of applications.
What happened when the S/O option was introduced, a deluge of applications.
What happened when the international cadet programme was introduced, 17000+ applications so far.
Thee will always be someone wanting a job here at what the company is prepared to offer at the time. It is that simple. If no-one applies then the the company sweetens the package, though it hasn't needed to yet.