Christ. Do most club have a transfer committee full of analysts and nobodys signing players the manager didn't really want? Congrats on spectacularly missing the point.
Well that does happen. But what most well run clubs do to prevent that is make sure they have a manager who is on board with the profile of the player they want to sign, otherwise they wouldn't hire that "coach".
But I will say that FSG completely fucked up with this compromise of letting Rodgers sign a couple of "his guys" if the committee signed a couple of "their guys".
And you better fucking believe that clubs like Real Madrid, Bayern, Chelsea, Man City, Sevilla, Juventus etc are going and buying players based on what upper management wants first, and not bowing down to the demands of the coach. But again, generally they go and find coaches that are happy to work in this structure.
The Harry Redknapp type of manager with his fingers in the pie of the transfer market does not exist outside of England.