The Travel Expenses Reimbursement Policy (http://wiki.documentfoundation.org/TDF/Policies/Travel) appears to say that if one chooses not to fly the cheapest way, or chooses to stay at an expensive hotel, then no reimbursement at all will be allowed.
I would think that the policy should say something like "only the cost of low-cost economy airfare will be reimbursed; if travellers choose a more expensive fare, they will be responsible for the difference in cost" and similar for the cost of accommodation. --Jean
