Here is the situation.
So I take a planet or two and now my cultural boundries stretch really far covering a lot of territory.
Another Civilization haws Starbases around several resources.
I cannot place a starbase due to the other Civilization's starbases.
No way to use diplomacy other than to trade for the Starbase and that is way to expensive.
No way to demand them to destroy or remove the Starbasse even when I am WAY more powerful.