How do I know? I was playing in Gallia as a player when Gallic Union came to be.
If Liberty wants to be the Sirius policeman, then it should make former gallic criminals pay to the last credit, not befriending them and giving up on any form of compensation for their actions.
Union and Liberty already are trading economically - that's what the guide to play people see in-game - rephacks and laws - say and always said (on top of the huge symbol of the cooperation - the massive IC base in front of New Paris). That you are in story and knew all along and never did anything about it is exactly what I mean. You had all this time to change that, was well aware - and it will be hilarious to watch if you now "fix" the corporate rephacks that never bothered you just because they are now backed by Gov to-Gov player roleplay.