A solo victory means that the player has over 50% control of the board, and therefore it is assumed that if war continued, the player has achieved the power to dominate the entire map, correct? Of course tactics and scenarios may lead to different outcomes but the point is that one player outmatches all the others combined, which is quite significant. This is why a draw is always better than survive, because it means that diplomacy has prevailed and there is not a single dominating player, rather, a player who would be stopped if they tried to conquer the board. 2nd place is only an illusion because the game stops at that point.
So, I believe it is quite appropriate to question a player's game priorities if they feel a strong survive represents a better finish than a draw. That is certainly wrong, and people should know that. However, it all depends on the game. Like many of you who said before, if you'd been perpetually screwed over by all the other players except the winning one, then throwing the game to them is an understandable, if not condoned response. Personally, I would never 'throw' a game intentionally. At worst I would commit solely to defense against those who were attacking me, if it weren't a concentrated effort to thwart the solo efforts of my ally. That would be worst case scenario.