"I am not necessarily disagreeing with what you are saying, but there is one mistake you make: a democracy is not a check on government, a democracy implies that the government IS the people, either in its representative form or its direct form."
Thats the definition of a democracy idd, but its i.m.o. not possible now nor does it exist on this planet on the scale of a nation. So you are right about the definition I do not say that.
I was simply explaining why our modern democracies (or what is generally called democracies, to be correct, because it doesn't follow the definition stated above) function so well and what is their strength and weakness.
"Institutional checks come from our belief in a mixed government and mixed constitution."
You have to explain mixed. You probably mean authoritarian and democratic?
"The executive is an unelected structure and so is the supreme court."
true. It makes it even less democratic following the principle again. However, in order to function the supreme court should not be voted on directly i.m.o. because the last thing we need is judges campaigning. Problem now is that in a lot of countries the executive or law giving structure is responsible for assigning them as well. The executive I'm all for.
"And what I meant by my comment was simple,"
for you because you know the meaning of it.
"in its representative form America's current government doesn't represent its constituents and represents the whole of the 'people' i.e. the working class even less."
No -what we call- democratic country does represent its people let go such a large groop of it. It can be controlled by elections thats all. So they can be kept in check to a certain extend but thats all.
"However, there is a demographic that is overly represented in politics and that is the bourgeois/capitalist class."
What is the bourgeois/capitalist class then?