Benefits paid (mainly to politicians and political decision makers) in order to affect the allocation of economic resources and material wealth or the rights thereto. Concessions, licences, permits, assets privatised, tenders awarded are all subject to reallocation fees. Here the damage is materially enormous (and visible) but, because it is widespread, it is "diluted" in individual terms. Still, it is often irreversible (like when a sold asset is purposefully under-valued) and pernicious. a factory sold to avaricious and criminally minded managers is likely to collapse and leave its workers unemployed.
Corruption pervades daily life even in the prim and often hectoring countries of the West. It is a win-win game (as far as Game Theory goes) - hence its attraction. We are all corrupt to varying degrees. But it is wrong and wasteful - really, counterproductive - to fight corruption in CEE in a wide front and indiscriminately.
It is the kind of corruption whose evil outcomes outweigh its benefits that should be fought. This fine (and blurred) distinction is too often lost on decision makers and law enforcement agencies in both East and West.