One thing I have never understood about my employer's use of Concur: every time we book a flight, we pay a commission to a travel agency. The agency provides us no service, and it's all on the traveler to actually browse schedules and fares in whatever GDS Concur uses -- there's just an extra $7 or whatever sent off to the agency for nothing, which we have to submit a separate "receipt" for. Why not just book directly with the airline on our travel cards?