However, from the American Institute of Philanthropy’s Charity Watch on 24 August: "The Clinton Foundation is an excellent charity... they are able to get 88 percent of their spending to bona fide program services and their fundraising efficiency is really [good]. It only costs them $2 to raise $100."

I don't know where you get your information from but it most certainly does not agree with what I have seen:

http://nypost.com/2015/04/26/charity-watchdog-clinton-foundation-a-slush-fund/
http://thefederalist.com/2015/04/27/in-2013-the-clinton-foundation-only-spent-10-percent-of-its-budget-on-charitable-grants/