People in our universities, even at the doctoral level, often have this attitude. There was one woman I went to grad school with who would consistently get Bs on all her papers, re-write them to the professors' specs, and get their grades changed to As. (To clarify this situation, in our Grad School, unless you maintain an average at around the B plus level, they ask you to downgrade from the PhD program to the masters.) So I would do the papers the first time and get my A or A minus--more often the latter. I would feel funny asking for a rewrite on an A minus, so I would just accept it. She ended up with a far higher average than I had, because she would impose on profs for all these re-writes. When I asked her how she felt justified in doing this, she said "I'm not paying them tuition to give me Bs!"