What's the difference between "putting all your wealth in a foundation that will do your bidding after you die" and "donating all your wealth to the most like-minded person that will continue to do your bidding after you die"? Sure, the latter isn't 100%, but the former isn't 100% either (regulations can change in the future), and even disregarding that, are we suddenly okay with it if the chance that your bidding will be carried out is 99% rather than 100%?