The pragmatism vs. idealism issue is an interesting one. Actually, I feel that both sides have their areas of pragmatism and idealism.
To me, it's an odd paradox, however. There is a greater ratio of Christians among the Right (let me know if I'm wrong), yet, the Left seems to be guided more by a kind of spirituality, often alluded to as "idealism" by the right. There is a kind of faith, even among those who are self-proclaimed atheists, that the Right doesn't seem to share.
These feelings are just vague notions I get when I read posts in this forum. I can't even specify what the "faith" is in. I just see it as a common thread through the messages. I would suggest that they may be sensitive to what the Chinese call tao, or the flow of the universe/nature. They know in their hearts what's right, and it guides them in their decisions. They feel imbalance, a shift too far in one direction that leads to instability.
This is not to say they aren't pragmatic or logical. In fact, I would say the Left is teeming with analytical types who philosophize about their views. When leftists argue against the evils of excessive capitalism, they most often explain their views in terms of the cause-and-effect of alienating large proportions of society by creating a huge imbalance of haves and have-nots. By creating a world of those who control wealth and those who serve them for subsistence.
That sounds like a pragmatic concern to me.
Bookmarks