Yes, words have meanings. What you call "true democracy" is what is usually referred to as direct democracy. You seem to be implying that a representative democracy is not a democracy. It is, it's just a different form than direct democracy.
In your previous post you said that the US is not a democracy, but a constitutional republic. Now you say that the US has a representative democracy, but operates as a constitutional republic, so I'm not sure what you mean anymore? You seem to agree that a constitutional republic can also be a democracy.
To answer your question, I agree with you the US is a democracy. The parent comment did not say that the US is not a democracy, it said that "companies and banks should invest only where democracy thrives". I take that to mean that this user believes that democracy is not currently thriving in the US, which I would agree with.
It is clearly possible to change the direction of an objects movement without doing work on it, if you consider forces perpendicular to the direction of movement.
In other words, you can change the direction of the velocity vector without doing work, as long as the magnitude stays the same (ignoring potential energy here).
In fact, a magnetic field is unable to do work, since it always acts perpendicular to the direction of movement of the charge that it acts upon.
The thing about conspiracy theories is that they are usually not falsifiable, at least not to their proponents.
As jboggan mentions, this theory is both falsifiable and testable in practice.
I think it's important that there are always a few people in science who go against the mainstream, as long as they do actual science, so falsifiable and testable theories.
In your previous post you said that the US is not a democracy, but a constitutional republic. Now you say that the US has a representative democracy, but operates as a constitutional republic, so I'm not sure what you mean anymore? You seem to agree that a constitutional republic can also be a democracy.
To answer your question, I agree with you the US is a democracy. The parent comment did not say that the US is not a democracy, it said that "companies and banks should invest only where democracy thrives". I take that to mean that this user believes that democracy is not currently thriving in the US, which I would agree with.