This view is far too simplistic to be very accurate, but the average liberal does nothing to diffuse it. There, they would presumably learn much better what the common man wanted and needed instead of at schools with the children of common men and women. This conceit drives people like Reagan Democrats nuts. Liberals have become detached from their base. Very few truck drivers run for Congress these days.
Liberals also have the conceit that they are on the side of good.
This means that they lay their visions out on the table every two years and expect the people to lap it up, even if its not what they are looking for. Instead of asking what is wrong, they tell. Ivy league liberals like Hillary and Bill, et al, know they know best. Being sure they are right, and on the side of good, they also refuse to play dirty. Republicans always raise more money and always seem to have better organization.