[evgen]

That would be because your representative is not a negotiator. They get to approve or reject the deal once it is done, but "people" do not get involved in the negotiation because "people" have a lot of parochial interests and are, as history has taught us, quite ignorant. Sorry if this bothers you, but it is how trade deals have always been done and is how they will always be conducted going forward.

[Scarblac]

But the flip side is surely that the chance that the whole deal is overthrown by the time legislators finally get to see it becomes a lot bigger.

I think they will not be done this way going forward, because these deals took ten years of negotations, and now they fail. It doesn't work anymore.

[evgen]

There is always the possibility of a deal not getting approved, but no trade deal would ever be negotiated in public. The problem with such public negotiation is that instead of a single deal where a country can decide to sacrifice industry X in favor of industry Y you get astroturfing and publicity campaigns from both industry X and industry Y seeking to gain favor in the negotiations. A pre-negotiated package may be a bitter pill to swallow for some, but the alternatives are non-starters; no one is going to bother to negotiate a deal with another country that tries this sort of public horse-trading so asking for the deal to be done in public is no different than simply asking for no deal in the first place.