The Clone Wars have led to a massive reform of centralized power within the Republic.
To ensure an early and certain victory, it was to be transformed by all means into a "nation that was easy to fight and quick to resolve". This included a constitutional amendment. Reassured by the promise of temporary amendments to minimize the casualties of the citizens of the Republic and the clone soldiers, the Congress concluded that the decline of democracy was legal in wartime. What was proposed was a revolutionary doctrine that would maximize results with minimal military action. The Turchin Doctrine.
It was so novel and excellent that even the Jedi Council seemed to have its tongue in cheek. Praised by Palpatine, Tarkin was elected a member of the military council (later to become Moff), and his coordinator was Anakin Skye. Anakin Skywalker was in charge of coordinating this. There was agreement on the withdrawal of the Jedi from military operations whenever possible, and the chain of command for military operations evolved around Palpatine and Tarkin. Most of them were human. When the Jedi Council heard about this from Skywalker, they complained, but they came to recognize the importance of the Tarkin Doctrine in the reality that the war was less favorable than expected, and that it had become protracted and bogged down.
While the Republicans elect their representatives through elections, the military advisers are selected by Palpatine for the sole purpose of fishing. So there are no trivial political constraints other than competence. The result is a group of really good soldiers and tacticians.
Satisfied with this, Sidious also deliberately misses the top brass of the CIS, effectively dispersing, concealing, and transporting weapons of mass destruction, prolonging them further through collusion and development of the arms industry, which the Senate finances on both sides. As a result, the Jedi Council, which is ostensibly in command, is exposed to public criticism. Meanwhile, Tarkin and his team of military advisors are encouraged to exist and become even more swollen.
Palpatine uses the teachings of the Sith to make the Council of Military Advisors the center of the Republic's military command structure. It is a teaching that pits internal rivals against each other and arranges for them to fight each other and not settle, always coming up with opinions that contribute to the organization. It forces them to think desperately about how they should contribute to the organization in order to defeat their immediate rivals. This human resource structure, which pits two people of the same competence against each other on the same playing field, is the cornerstone of an empire that "gives appropriate authority to those with power. The higher-ups will be given the title of Moff, including Tarkin.
Once this organization directly under Palpatine matures, Sidious will easily use the Jedi to end the Clone Wars. Then, after purging the Jedi, he will wipe out the incompetent officers and military personnel. Unlike the Senate, the Emperor can exercise his personnel powers at his own discretion since he was not elected by popular vote.
Moff's advice satisfies the emperor. To keep it in place, a confidant, Vader, watches over it. Translated with www.DeepL.com/Translator (free version)