Plato's "system" was oligarchy --an elaborate, gruesome, and explicit hierarchy of castes ruled by so-called philosophers. This political rubric reflected conditions in Athens with which he was intimately acquainted, being a paid informant of wealthy benefactors there. He was a selfservin sumbitch by measure. If you doubt, read his unanswered, Letters from exile toward the end of his life, during which his pupil Aristotle methodically finessed his social commentaries (Socratic "Dialogues") into a novel form of epistemology, generalized, "natural" history.
Republic. Read it. In its entirety, pls.

Diversity is the key to economic and political evolution.

Also, Popular Vote legislation does not modify, eliminate, repeal Article II, § 1 of the US Constitution. That is the legal design of this country form of government.

Modification, repeal, or elimination of any provision of the US Constitution requires a convention of all states assembled to ratify a bill, enacted by the US odious for the specific purpose: Article V

UNTIL THAT OCCURS the duties and obligations of future states' and federal legislatures to the to the US CONSTITUTION cannot be bound by expeditious political acts, or ahhh "alternative arrangements," of the current cohort of US citizens; or even a US Supreme Court's opinions and orders.

BTW, the president does not legislate. So, really, what beneficial, political effect does the Popular Vote Compact obtain "for the people"?

Diversity is the key to economic and political evolution.