[Liber-Abaci]

My interpretation was also they didn't trust the charities/groups weren't embezzling the money.

>So, for instance, a non-profit that works to improve sanitation could use donor funds to build toilets, hire more people or even buy a laptop or other equipment that might make them more efficient. But most donors, Mr Bhagwati says, will set conditions about how they want the money spent. In other words, they will insist on the toilets being built. He calls this "restricted giving" and says it's hard to coax people to give any other way.