SHEER COINCIDENCE: Last Monday, the Social Security and Medicare trustees released their annual depressing report. On Tuesday, congressional negotiators handed President Bush a "victory" -- his assessment -- in agreeing to extend his capital gains and dividend tax cuts. Mr. Bush and his fellow tax-cuts-above-all proponents would like you to believe that the two events are unrelated. But taken together they underscore the terrible fiscal predicament that Mr. Bush has chosen to bequeath to his successor. According to the new estimates, the Social Security trust fund will be depleted in 2040, one year closer than last year's projection, while Medicare's...