After Jeb Bush left office, his income increased substantially, and when his income increased, so did his giving: in 2014, Mr. and Mrs. Bush gave away more than $300K.
"As Jeb Bush mulled a bid for the presidency last year, his annual income reached new heights — as did his charitable giving.
"Mr. Bush, the former Florida governor, and his wife, Columba, reported income of $8.3 million in 2014, the highest total over the 34 years of income tax returns he has made public. At the same time, the Bushes gave $308,734 to charity, nearly tripling their giving from a year earlier."--Matt Flegenheimer and Steve Eder, The New York Times