I am pretty much fed up with this matra beind said in every post of every Western poster, including you, Tom.
It is very frequent in Western press, is taken for granted and copypasted by all of you without really thinking.
People very easily tolerate corription if their level of life keeps getting better, and Russia is a perfect example.
Navalny made a bet on it in his CIA-manufactured film about the palace of Putin and failed.
Of course it irritates and makes people angry, but in countries like Ukraine or Central Asia or Caucasus republics corruption is as much a part of life of everybody as breathing.
I bought a piece of land in Crimea and am going to live there when I retire, so I have to deal with local beaurocrats while I build my house. There is nothing more awful on Earth, population of Crimea is predominantly Russian but 30 years of Ukrainian yoke/influence has spoiled them so much that I get shocked every time I have to deal with local administration. Nothing works properly and without bribe, contrarily to Russia. I imagine what they have in proper Ukraine....
Anyway, it is not corruption which matters much, it is rather greed and lack of civilization. Rural Kazakhs mentally live in 18th century and view both Russians and Russified urban Kazakhs as rich targets, they envy the very urban way of living, culture. It is a complex factor.
With corruption playing a minor role...