Keep in mind that Wikimedia is managing a lot of community volunteers as well as their direct employees. The travel expenses may include paying for some of their volunteers to visit them, for instance.
There are lots of reasons why their travel expenses could be so high - I don't think it moves the conversation forward to suggest arbitrary reasons without some specific proof.
It's also worth noting the foundation has had issues to expense irregularities in the past [1], and so if anything there is cause to have pessimistic assumptions rather than optimistic ones
I posted regarding the volunteers requiring additional management, since I felt this comment was downvoted for presuming volunteers == travel expenses greater than the travel expenses caused by the Board.
It's also worth noting the foundation has had issues to expense irregularities in the past [1], and so if anything there is cause to have pessimistic assumptions rather than optimistic ones
[1] http://www.theregister.co.uk/2008/03/05/jimmy_wales_and_dann...