Is this an admission that there is no such press quoting 500k?
Moving on, since we're speculating, entirely, as to how much he might ask, let me ask, do you know of any other player who has had their earnings virtually doubled in a contract extension? If not, I struggle to see why you think he will ask for so much.
At best, he will ask to be on a par with Dave. That's reasonable.
Do I think he deserves 375k a week? Sure, why not. Perhaps you don't agree but this is entirely subjective from our various perspectives. What matters is whether Ole and the club agree that he is worth it, and who would you be to disagree with that?
Finally, as to plenty of average midfielders having better goal-scoring records, I would have to recommend that you deepen your understanding of football. A midfielder who predominantly plays in a double pivot is not expected to have a great scoring record. These sorts of players are not judged by how many goals they score but on other facets of their game such as passing.
If you insist that there are plenty of average midfielders who are as good as Pogba is at all the things he is good at, well have it.. who are they?