The problem is how do you define "fair representation of the minority opinion"
which "minority opinions"? The far left of center conspiracy minority? The Socialism is best minority? The Anything goes libertarian minority?
And how will we balance the Islamo-facist opinion with the Athiest, Roman Catholic, moderate Protestant, and Conservative Christian opinions (not to mention the SDAI-Tech wave form opinion) After all, each needs to be fairly represented.
And that brings up even more uncertainty: What is "fair representation"? Assuming that there is only 2 sides to all issues, how do you define "conservative" vs. "Liberal", and how much representation of each is needed to constitute a "fair" balance?
And what happens to the moderates who hold some "conservative" and some "liberal" opinions.