Yes. By who? Right now, for instance, we are talking about this because of a report from Daily Mail who thinks he already earns 70k. That is of course bullshit.
Look at what other United players earn. It would be more than Shaw, more than Martinez. More than Eriksen who joined on a free. He would be the best paid defender minus Maguire, and earn way more than the other players United have signed this window. Garnacho is probably going to get his second contract extension already, as a reward for being the only shining light in attack and being one of the most sought after talents in his age group, and he's not going to get 160k.