Ideas Why it matters that our politicians are rich Science is finding that money actually changes how you think and act—and not for the better ← Related Article Visit The Boston Globe Share on Twitter Share on Facebook Comment on this Scroll to top of page Gerald Herbert/AP MITT ROMNEY: Built a $200 million fortune in his private equity career. SAUL LOEB/AFP/Getty Images BARACK OBAMA: Book royalties alone ran to $2.5 million in 2008. Evan Vucci/AP NEWT GINGRICH: A $7 million fortune, with an up to $1 million revolving line of credit at Tiffany. Robert F. Bukaty/AP RON PAUL: Worth as much as $5.2 million. Paul Sancya/AP RICK SANTORUM: Disclosed last week that he earns roughly $1 million a year.