Will Oremus compares Newt's moneyman to other big-time donors: 

Never, that we know of, has an individual propped up one candidate’s campaign to such an extent. That is, an individual other than the candidate himself—candidates have long been allowed to bankroll their own campaigns, a fact that has favored ultra-rich hopefuls like, well, Mitt Romney. Romney has in fact significantly outspent Gingrich in the current campaign, even counting the Adelson money.