Well, only you would know the answer. Who owns the transportation networks in-game?
Moreover, it's not like transportation inefficiencies mean that someone must be recieving the lost profits, it simply means the profits are never made in the first place. So yes, it could be a black sinkhole without breaking anything about the game other than a commitment to make sure the finances are completely circular.
That said, I find the idea of tracking every d. very interesting and am looking forward to seeing it in action once the game comes out. Esp. since OH thinks there will be a 'buy-domestic-first' mechanism and that blocades really could be implemented; that covers most of what I wanted out of the new economy.
Buy domestic first is in Victroia 1 and the Economic system is similar. So that is not changing.