The Clone Wars have effectively crippled the Senate Assembly.
Giving Palpatine, who presumed to be the emperor, a lot of power, created a legitimate dictatorship.
Ostensibly reluctant to empower the chancellor for fear of prolonging the war, he was in fact naturally relieved that the war would be prolonged by the advice of the Jedi and the lure of bribes from the military-industrial complex. But it is also true that they have promised their people that they will restore the functioning of parliament when the crisis dissipates. So, I will make sure that the constitution of the republic, which has lasted for a thousand years, will be debated frequently in the media to see if it is correct. The public becomes increasingly hopeful about the future political system that is being devised around an innocent Palpatine. But this is a very dangerous sign of democracy. It is rotting away from the will of the people from within. It begins to manifest itself in the form of dissatisfaction with the senators. Fearing that they will not be re-elected, the senators push for further centralization of power to raise public expectations. For some reason, Palpatine, taking advantage of the fact that the war is not going to end easily, makes victory in the war an absolute requirement, with a policy of respecting the will of the people. However, he also had the humility to give up his emergency powers at the end of the crisis. Fewer and fewer citizens questioned whether this humility was the real intention.
It is also true that some legislators took this point into account. If the new political system did not specify the return of emergency powers, the war would be won, but it would be for naught. The senators who were concerned about this can only praise Palpatine as a symbol of the will of the people. They have no choice but to ask Palpatine to guarantee his position in the Senate after the war is over. Otherwise, in the worst case, bribes from the munitions industry would be discovered and he would lose his social status as a senator.
Satisfied with the situation, Sidious ensured the Republic's victory by using the Jedi as his cue. He easily seizes all the power in the galaxy by promising to continue to function as a parliament in front of the panicked senators, who are flustered by the sudden termination. The senators who agree to this receive huge reparations from the emperor from the CIS as a reward. So the Emperor had the power to dissolve the Senate but did not do so. At the same time, the existence of the Senate was intended to make the people accept the respect for the will of the people.
Palpatine, who had been disappointed with the dysfunction of the Senate Assembly since he was a member of Naboo, legally created the longed-for Imperial Senate, where his words would be praised and immediately implemented by all members.
Translated with www.DeepL.com/Translator (free version)