We can't just throw money around constantly over paying for people. It's shows desperation on our part and it's something Moshiri continues to do.
Only so far a club can do this for before it all falls apart.
You can also view it as part of a learning curve for Moshiri.
The man has never owned a football club before, and all his previous success has come through his relationship with Usmanov. Whilst Everton may not be the biggest project he has taken on from a financial perspective, it is without doubt his most challenging and one that he is (so we are led to believe) doing entirely on his own. He was never going to get every decision right.
In a venture like this mistakes are going to be made, and you'd like to think he recognised it wouldn't all be plain sailing when he came on board. City didnt get it right when they first got rich. These things can take time.
Whilst no one wants to see us get it wrong, the more important thing is that Moshiri has deep pockets, is hopefully in it for the long term, and learns from his mistakes.