here it goes:
since the driver of the weekend votes, sebastian vettel has won 15 races – and only 4 driver of the weekend “titles”, all of them after wins.
hamilton has always won after winning a race, and twice when vettel won.
alonso only lost when winning a race in hockenheim 2010, for obvious reasons; and once more to perez, in malaysia. but he’s won twice in vettel wins.
button has won every time he has won the race, which is 4; he also snatched one off vettel (monaco 2011).
so that’s the picture. some reasons mentioned on this thread help explain this, but there must be more to it.