Not everyone will have the time or ability to understand the intricate details, but unless no-one has that time and ability, there is still a strong argument for keeping things transparent and, as a consequence, open to scrutiny by independent experts (and anyone else who will be affected by the deal and wishes to take an interest).

Exactly the same considerations apply when making laws without our own countries, yet most of us would probably consider having our representatives working entirely behind closed doors very suspicious and many of us think freedom of information laws are an essential part of our democratic processes.