But it's his own wealth, so that's okay! The author-president and the First Lady raked in $2.73 million last year — mostly royalties off Obama's two best-selling books — and besides the nearly $50,000 they selfishly spent on their own children's educations, the Obamas were pretty charitable, according to their tax returns. The First Couple gave about $172,000, or 6.5 percent of their income, to 37 different charities, in 2008. Of course, if that sounds generous, consider the compassionate conservatism of the Bushes, who donated $165,660 of their $719,274 income to charity last year. [NYDN]