After teaching Kelly started at the bottom as a teller and her hard work got her the breaks into the upper echelons, it wasn't meteoric.
Norris was the right man at the right time for the job. CBA was still using Windoze 3.11 when WinXp was the norm, the previous management had backed themselves into an IT sh!thole and Norris was chosen to get them out of it.
I wouldn't even compare Samson with the calibre of the above two.
In fact Samson's skills are in spinning bullsh!t - you can make the connection for yourself as to why he's needed by Qantas.
But that's ok, because this board has an unlimited stockpile of lift fairies and thrust pixies to keep Qantas planes flying well into the future as it seems.