That said, I don't believe in focusing on class-based politics in this day and age; the Supreme Court has made it clear that money is permissible to influence election outcomes and that can and does drive these sorts of structural shifts in politics to allow for the ultra-wealthy to massively influence political outcomes in our country.
TL;DR: I would tell someone that being under an oligarchy may be true (I cannot be certain as I'm not a political scientist), but there are other far more important issues TO THE GENERAL ELECTORATE that resonate better and should be the focus of future candidate messaging in order to win the election.
That being said, there was no contest post Biden drop out, although there was a party alignment
If we're being pedantic (which we absolutely are at this point), "you" is always plural, and plurality is sometimes used to denote formality or respect for a singular subject (analogous to vous in French, or Sie in Germanic languages). It just so happens that we exclusively use the formal/respectful version in English these days.
The only truly singular singular second person pronoun in English is thou, which was the familiar form (although now because it is so archaic people ironically interpret it as more formal).