More importantly, when its hard-trained pilots have been poached by its competitors, an airline will be embarrassed by the problem of pilot shortage, which is more than a slim sum of transfer fee.

更为重要的是，辛辛苦苦培养的飞行员被竞争对手挖走后，自己却面临飞行员紧缺的问题，这不是一点转会费就能解决的。