It certainly makes for interesting literary theater to blame some imagined “rich oligarchy” for the world’s troubles. Unfortunately, it’s not quite that simple. You’re looking for Authoritarianism in the wrong place.
A liberal democracy is therefore a “political system marked not only by free and fair elections, but also by the rule of law, a separation of powers, and the protection of basic liberties of speech, assembly, religion and property”
Yes, that’s exactly what it is. And it’s exactly what modern Liberalism in the United States isn’t.
How does the Democratic party measure up to this idealistic description? Hmm, let’s see. A DNC that admits in open court under oath that they have no obligation whatsoever to respect the will of voters? Check. Liberal college students that believe the only protected speech is that with which they agree? Check. A Presidential candidate that was not only morally compromised but deeply entrenched in the very oligarchy that you so cheerfully vilify? Double-check.
The Democratic party is the party that cheers for the little guy, and then stabs them in the back when they’re not looking. They have no interest whatsoever in the disadvantaged, other than to obtain votes. All they’re interested in is keeping themselves and their ideological constituency in power, and perhaps siphoning money away from business owners and middle-class people for their pet projects that don’t work.