- the hiring practices that they engage in aren't entirely 'above board' or as clear as they'd like you to believe...
'How to Get a Job at the Big 4 - Amazon, Facebook, Google & Microsoft' by Sean Lee
- note the background of many of these people? They're generally from middle to upper class backgrounds (not genuinely 'dirt poor')? This means that they have a lot of advantages in life such as educational opportunities, a network of contacts, etc...