I don’t think Marx advocated for no money to exist or be exchanged.
It sounds like your interpretation of communism is a hippie commune or co-ops. Not really the same thing.
Again, Engles:
Finally, when all capital, all production, all exchange have been brought together in the hands of the nation, private property will disappear of its own accord, money will become superfluous, and production will so expand and man so change that society will be able to slough off whatever of its old economic habits may remain.
This is, of course, the distant ideal and not what Marx and Engles advocated for doing immediately. This is why it's important to understand the distinction between the ideal of communism and what communists advocate for in the present material conditions.
And because of Citizens United, and Israel, “elected officials by the people” might be a subjective interpretation of our current politicians.
And this is precisely why some form of authority has to exist in order to stop the bourgeoisie and reactionaries from influencing the political system. Even if you got rid of Citizens United and made bribery illegal again, the rich would still exert influence on politics through the press and through their control of the means of production. Citizens United is a symptom of that problem, not the cause. There's a broader reason why Citizens United became a thing in the first place.