edit: here's a story about Japan Airlines, which apaprently had a spate of accidents in 2005, but previusly, hadn't had a fatal accident since 1985 (and apparently was the last airline in 2005 to have had a crash). https://www.nytimes.com/2005/10/05/business/worldbusiness/sa...
Saudi Arabia for all that it is authoritarian isn't corrupt (within it's own country) they are pretty effective at rounding those people up on a regular basis. North Korea is stuck in the 1960's and led by an insane idiot but they execute people for using their top offices for personal gain.
That is an incredibly naive point of view on the issue. USSR used to regularly jail/execute people for corruption, so to the outside it might have looked like it was really hard on people using their positions for personal gain.
But the truth couldn't be any further from this - basically everyone was corrupt, because that's how the whole system worked - and the people who were prosecuted were the ones who have fallen out with someone even higher up. It was basically the case of everyone is guilty, but the ruling party would selectively pick people to blame for things going wrong. The surveilance apparatus was very effective and it was trivial to find something on someone, it was just a matter of how hard you looked - and I can guarantee that pretty much everyone had to either take or give a bribe at some point in their lives, because the simplest things in life(like getting coupons to buy food for example) depended on you giving a "gift" to the right person.
This is a textbook means of social control. You may also refer to our war on (some) drugs (when consumed by certain people).
https://en.wikipedia.org/wiki/Nomenklatura#Patron–client_rel...