You’re conflating two different things.
Money and expectation.
He earns whatever he does, because he’s a very good player, with a proven pedigree and he like everybody else he should get what they can out of their career. Good luck to him.
What he earns has got nothing to do with anybody.
Where the point has validity is the expectation that comes with his signing. He is scrutinised more (not abused, quite a few have had very similar treatment) than anybody because he’s supposedly our best player. This point is lost on many. If he was average Joe, no one would be that arsed about him. IE Reid.