It is always hard to argue that democracy can be allowed to work transparently in a State where the political parties are wedded to PR. 

The evidence is clear that under PR, party "sponsored" corruption is virtually inevitable since "loyalty" is paramount & often rewarded handsomely. Even the righteous Chancellor Kohl was found to have illegally received funds for the CDU, & we really musn't look to Belgium, Austria or Italy for corruption free systems!! 

First-past-the-post systems appear to give constituents a final say & thus allows a more instinctively  transparent set of politicians to emerge. Nothing will guarantee a corruption-free political world, but PR seems to naturally encourage the opposite & is certainly much more open to abuse by the "democratic centralists" of this world. 

PR has already achieved the opposite in SA at all government levels. Oversight by the citizenry is clearly of secondary importance to the survival of the bloody PARTY!!!