Just a day after the news hit of the additional benefits awarded to Philip Purcell when he left Morgan Stanley as chief executive, comes word that another billionaire's benefits perked at the expense of its shareholders. Citigroup, according to public filings cited by The New York Times, apparently could not give Sanford Weill enough; beyond his $21.5 million pay, the bank paid his taxes and benefits last year, which came to the tune of hundreds of thousands of dollars. In addition, Citi picked up the tab on Weill's use of the company plane (estimated at more than a half a million dollars), dental claims ($61,846) and personal financial planning advice ($85,714). To top it off, after he steps down next month, Weill will receive an annual pension of $1.1 million. A Citigroup spokeswoman says the bank has long been paying such benefits, but this year it "voluntarily disclosed more information" so that investors get the "most accurate and transparent" results. By the way, a filing also revealed that Citigroup's CEO Charles Prince got a 16% raise, to $23 million.