As political buzzwords, “bipartisan,” “nonpartisan” and “independent” sound elevated and even virtuous, which must be why we so often hear them touted as remedies for our national ills. Every four years, the promoters of these miracle cures seek a vessel for their illusions, preferably someone whose fortune is as limitless as his ego. This year’s model seems to be Michael Bloomberg, the mayor of New York and billionaire owner of the national business news service.