I think galactic market is an oversimplification.the last EU I played was from a CD that came with a gaming magazine like 18 years agoBut what I rermember, there were multiple markets. Some countries had monopolies. Meaning, some people were making a lot more money based on their position in said market.I think that galactic or RL worldwide 1 trade center is pretty unrealistic, unless we presume that there would be just 1 pretty much world-power, like the wannabe U.N. and their power-hungry occultists. Enforced 1 worldly or galactic currency would prevent trade in anything else except barter, especially when you are set as an undesirable. With the center being manipulated by whoever has the most power over it, it would in essence create what the US was doing when its currency was the world reserve currency, as well as if economy doesnt work well enough, enforce the demand on your vassals. Then you have some extra-state power players like 'uncle' Gyorgy Soros, who have an agenda, who are tolerated by powers that be basically.For example, if you want to protect your economy from being destroyed by otherwise overwhelming economic power from the outside, that seeks to use your resources, to enrich themselves the most, you have to set barriers. If you are a small player, you should be able to close the door or set barriers on how much foreign stuff gets inside. The more economies enter the galactic trade, the stronger it becomes. But when power players deem that the trade is not in their interest, they can sabotage the trade like what mentioned country is doing. Power over wellbeing, sovereign country defending its statehood, not delegating powers elsewhere from its people. Then another struggle, to rule over nations, to create empire that is on top of the state machinery.With just 1 galactic market with infinite resources, just like they were with enclaves, you will miss out on the possibility of trade warring, as you may have heard someone saying, that trade wars are good. That depends on your perspective, if you can survive it and win, your economy interests win, the other side loses without firing a shot. Trade wars can destroy economies just like fighting wars, create hunger and murder indirectly. If this could be simulated, you would have other means of playing a power hungry maniac or one defending against such an animal.