One solution is already in the comment you're replying to - by setting up a dedicated org financed well into the future via the endowment so that it would not b

One solution is already in the comment you're replying to - by setting up a dedicated org financed well into the future via the endowment so that it would not be affected even if all income dries up and the other org collapses. (nothing foolproof about this, it's a challenge, but still)