This is flat out false.http://tsfiles.wordpress.com/2008/06/15/charity-donations-and-liberal-hypocricy/
"This evidence of liberal hypocrisy is damning enough, but what really amazes is how poorly these liberals do in comparison to so-called heartless conservatives. President Ronald Reagan, for instance, was often called heartless and callous by liberals. Unlike Roosevelt or JFK, Reagan was not a wealthy man when he became president. He had no family trust or investment portfolio to fall back on. And yet, according to his tax returns, Reagan donated more than four times more to charity both in terms of actual money and on a percentage basis than Senator Ted Kennedy. And he gave more to charities with less income than FDR did. In 1985, for example, he gave away 6 percent of his income."
Carter, to his credit, is one of the few exceptions due to his work with Habitat for Humanity. But I'm not sure if it is real charity from the heart or PR to sell his books and his idiotic foreign policies.
Reagan, on the other hand, genuinely loved working with young people and left his ranch to Young American's Foundation, one of the finest education organizations out there and one of the few which is doing an effective job in countering the stranglehold which the left has on college campuses. He was actively involved in getting YAF gatherings started at his ranch retreat and continuing them into post presidency as long as his health permitted.