I think something that could be called corruption is everywhere once you know what to look for. The difference is that normal people in Western Europe and the Nordics don't know what to look for.

Bringing a bottle of expensive vodka to smooth over some bureaucratic procedure is nothing compared to what goes on in the big leagues.

Something to keep in mind, corruption indexes like this one https://en.wikipedia.org/wiki/Corruption_Perceptions_Index are actually about the perception of corruption. After all it's the only thing that's easy to measure.