I sincerely doubt KSE has decided to stop spending. I wouldn't be surprised if they were pushing back harder on some of the signings proposed to them.
Firstly we remain very close to what we need for a title-winning campaign, and I believe a couple of major trophies would be a commercial gamechanger for us. Secondly KSE need to spend large sums to maintain us in the top four in any case.
My understanding has been that it's been Tim Lewis who has done a lot of the advocacy and upward management under the current structure.
Perhaps Lewis's relationship with Arteta is faltering based on the way last season ended, Edu's departure, this season's progress and so on. Given how we're tracking it probably should be. KSE should be asking why we have a lopsided squad and we're slipping back from last season's level, key players like Saliba are starting to shop themselves around a little bit, and so on.