Russia is not pro-free enterprise, therefore it cannot be corrupt. Very much the same as 0bama, or any member of the Democrat or Socialist Party.
It is called obedience.
You do not comply, you get pneumonia or firing squad.
If there is the hope of squeezing something out of you, then mercy - Gulag.
Apparatchiks are rewarded by special privileges that working class can only dream about.
Seeeee? No corruption.