Where are YOU getting the idea that "this rarely, if ever, happens"??
The fact is that the applications are processed at CIC by PEOPLE, not computers. And just as any other people, they have emotions too. So imagine how someone would feel if they're dealing with dozens of different applications at any given time, and ONE of those applications are coming with additional nagging from a politician. Do you REALLY believe that the person processing that application will just smile and continue working on it? Or will that one specific application go straight to the bottom of the pile?
Gee...I wonder...