Well you noticed to major things there, he talked about Morrison AFTER he REJECTED the contract, not during negotiations.
When Fergie wants to talk to the press, it will be to GAIN an advantage in negotiations. Quite right that while Welbeck isn't close to worth 60k a week, Fergie has decided to both, start him ahead of a 150k a week striker frequently and also play him alongside a 250k a week striker, Fergie/Utd are in the weak position here and Fergie talking about it publically won't help. Shaming a non first teamer but potentially making him embarrassed to ask for so much and everyone tell him he's an idiot might force his hand and make him sign a contract lower than the one he wants. With Morrison he's not first team, Fergie has all the power, entirely different situation.
Anyway, welbeck, average player, better with Rooney, not even close, better in the ridiculous system they are using, maybe.
IE Rooney "up top" with berbatov behind him would be far and away, by a massive margin their best offensive setup. Rooney as a deep player and almost a playmaker, is almost retarded, and Berbatov isn't really the type of player to feed off scraps and the kind of largely useless balls Rooney provides and the isolation a striker playing with Rooney in that kind of setup causes.
Welbeck isn't a patch on Berbatov.
Overall though, when you put a player on 250k, EVERYONE from the next best player(or the several better players
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) to the worst player suddenly thinks they deserve more. If the bottom of the run was getting 5k , middle 50k, while Rooney got 150k, when Rooney gets 250k, the bottom guys now want 15k and the middle guys want 75k.