And another thing
Here is Paul Krugman on the filibuster. It's important to note that there's nothing in the Constitution about it (or health care, blah blah blah -- point being, it's a rule the Senate made for itself).
Nobody cries for the single senator unable to bend the other 99 to his will, or any two such senators. Or any twenty such senators. And the history of the filibuster in the U.S. Senate acknowledges a gradual relaxation of the rule, with the 60-vote cloture having receded from a 67-vote cloture while Robert Byrd was the Democratic leader, which itself was relaxed from higher totals.
There are plenty of other problems: Lieberman, the apparent Catholic bishop veto some congressmen allow, the media that indulges Lieberman and McCain every week, etc., but that one of the two Congressional bodies has a routine 60-vote hurdle is among the top.