No contradiction, he's on 8m a year here, I don't think he'd move to ManU if they offered 9m a year. So money isn't his driving factor as he'd prefer to earn 1m a year less at a club he's happy at.
If they offered 20m a year he'd go as no one is turning down that much money.
So money isn't a driving factor but if enough is offered it becomes a factor.