It's weird that Naboo's seat in the Senate became vacant when Palpatine was appointed to be Chancellor

It looks like the Chancellor is the head of the executive branch of government and the Senate is the legislative branch. It also looks like Chancellors are appointed by the Senate and are accountable to the Senate, not the electorate. This makes the Galactic Republic a parliament, by definition.Yet in most parliaments, cabinet members are considered to be the incumbent of their constituency's seat. The Prime Minister of the UK is also the member of parliament for his constituency. This is not so in the Galactic Republic. Somehow, when the Senate named Palpatine to the executive, Naboo's legislative seat opened up.That raises the question: Could the Senate have chosen someone not amongst itself to the executive? It might as well, because what would be the point of asking them to win a Senate seat first only for them to immediately resign from it to join the executive? If so, the Chancellor is merely someone hired for the job by the Senate, not accountable to the electorate and not part of the Senate. So why all the pomp an circumstance for the Chancellor if he is only an employee of the Senate and not an elected official in his own right?This makes it even stranger that the Senate didn't make the Chancellor report to the Senate more often after the Senate gave him emergency powers. The Senate was the only democratically-elected body!EDIT: I guess the Galactic Republic has a similar structure to the real-world governments of South Africa, Botswana, Myanmar, and Switzerland. So it's not completely unheard of. via /r/StarWars https://ift.tt/2ZTkIYj