If staff is needed, that means that the day that there is no longer money, that project would't be self/sustainable.
Do we really have so much Capacity Building needs? WMF is going to become the corporation with more human resources in the world. Wikimedia Affiliates already work in most countries of Europe and some American Countries, Which specific CB needs are needed there?
We don't 'clearly' need paid staff for sharing experiences and coaching volunteers. Will we have professional coaches going around the world? Formation to participate in Wikimedia Movement will last more than a University Degree? How much people, how much time is 'clearly'?