Lowering the rating by one level means innumerable benefits; the taxes are reduced significantly, and no level of government wants to be responsible for that.
It's basically impossible to get approval unless the situation is truly exceptional.
The 0.4 developmental degrees that the Fatches Tri-Star has lost must be carried forever—unless there's actual development.
The Fatches Family originally received around 2.8 billion in taxes annually from Tri-Star. After paying the Imperial Tax of 2 billion, the remaining 800 million or so made for a comfortable life.
But if it rose to 3 billion, that would be unsustainable.
If Gu Hang didn't replicate the Alliance system here and continued to use the old United Government's system, it would be futile.
After doing the math, did Gu Hang end up having to invest an additional two billion each year into the Fatches Tri-Star?
That was unacceptable.