OK eduelp, I will bite..... where do you think they should be getting their managers from, after all they probably need to speak good English? So take your pick, Singapore, India, Sri Lanka, Australia, NZ, which ones would make you happy and feeling less racially offended.
The reality is the company needs managers from 'developed' nations that have robust aviation and business systems, as well as countries with a sound regulatory framework. The fact that managers come here, realise in short order that unless they play the game by the local rules (blame, bully, punish) they will not keep their jobs. They also realise very quickly that if they play the game and cut costs at every opportunity they will be well rewarded individually with bonus's and merit pots. So those smart enough gradually creep away from any moral compass they ever had and fill their bank accounts. Who is to say any of us would not do the same in their shoes, I would like to think I wouldn't, but.....