I've worked in both airline and bizjet sectors and I echo most of what tomuchwork said and ALL of what I-AINC said! One thing that tomuchwork said in particular is very true in that it's often those with the best connections rather than the best abilities that get the best jobs, I've come across that on several occasions in the bizjet sector.
Which sector was it that left me over £20k out of pocket in unpaid salary from redundancy and going out of business? It certainly wasn't an airline!