First, as I understand it the USSC is looking only at so-called faithless electors. I'm not sure how that might be "the beginning of the end of our nations great experiment."
Second, as has already been explained (in large part by Pogo), the system was not set up to require electors to follow the votes of the people of the states they represent; in fact, originally, there was no election day and electors were often (or perhaps all?) chosen by state legislatures.
Third, and this is one that always bugs me, California and New York simply would not control the outcome of a national popular vote. This is true for a couple of very simple, easy-to-understand reasons. The first would be population. According to the Census Bureau, in 2018 California had a population of 39,557,045. New York had a population of 19,542,209. The total population of the country was 327,167,434.
U.S. Census Bureau QuickFacts: United States
Unless one is going to assume that California and New York have a much higher percentage of voting-age citizens, I think it's safe to use the whole population numbers to representing the voting public. As such, those 2 states represent about 18% of the population. How will less than 20% of the people control the rest of the country?
Second, and most importantly, neither New York nor California is filled with people who all vote for the same candidates. I don't know if there are a lot of people who get fooled by the winner-take-all nature of the Electoral College, but just because those states have all of their electors vote for the Democratic presidential candidate does NOT mean that all the voters voted for that candidate. In the same way, just because Texas (a state with a much larger population than New York) has all it's electoral votes go for the Republican presidential candidate does not mean all of the voters choose the same candidate.
In 2016 Clinton received 8,753,788 votes in California. Trump received 4,483,810. In New York, Clinton received 4,556,124 votes, Trump received 2,819,534. With a popular vote, Trump would actually get MORE representation from the voters of California and New York than he did in the election, as the WTA gave him ZERO.
Is the math difficult to follow? Are the concepts complex? Californians and New Yorkers do not all vote the same. Even if they did, there are not enough voters in those states to control an election by themselves. I'll add one final point: The president is not a king nor a dictator. Because of these truths, no 2 states can control the country by themselves even if the president were elected by popular vote. This comes up in any discussion about the EC, and it's just as silly every time.