There are a few comments / articles that are indicating that AFC can not afford to re-sign both Ozil & Sanchez to even a 250k+ pay rise, because of the restrictions to the % your wage bill can increase by in relation to your revenues.
A couple of points on this
1 - player sales will both reduce the wage bill AND increase revenues;
2 - if they don't sign a new deal then they do not become an issue.
To achieve point 1 we need to sell the high wage earners that contribute little,
which then also allows us to continue to pursue Mbappe & C0.