The Vasudans had a very good reason to try to increase their influence - their homeworld was destroyed, the Terrans' was only cut off.
Should Sol ever get reconnected, the Vasudans would be at quite a disadvantage, unless they had the stronger position in the GTVA.
I personally don't think that it's a conspiracy reaching up to the emperor to take over the whole GTVA, but there would definitely be some power play going on behind the scenes...
Like some secret trade deal phone calls that seemed to not have taken place at all and such.
Maybe even a secret Vasudan NTF sort of thing?