Ok...

[Alneyan]

I second that Geo. In TGE3, my score was above 300% of the second player for many turns, and I did not even play to have the highest score possible (that was just my usual Base Space Yard/Light Carrier production). It would have been very easy to create even more inflation, by building empty starbases, or something along these lines. But I was still a long way off from being able to take on the whole galaxy on my own, though a few Empires would have suffered in a global war.

I would much rather vote on ending the game, when it looks like an Empire cannot be defeated, no matter what. NGC3 ended a few turns before the final clash against the leading Empire (we would have been crushed, but still, it is much better to be defeated in the field than by numbers).