The gov't oversight portion of the purpose of the EC went out the window when states all passed laws that require the electors to vote for the candidate that carried the state. The other purpose is argued to be so that a few populous states cannot elect the president--one person one vote does not seem to be what the constitution requires. The existence of the Senate confirms that. All that being said, this article from Time magazine is interesting. https://time.com/4558510/electoral-college-history-slavery/