Roberto Mancini wants more players. He has arguably the best squad in the Premier League and probably the most expensive one but he wants more players. The world is heading to financial meltdown but Mancini wants more players. The club used to have a great academy, which produced good players – but Mancini wants new players. City needs to consider Financial Fair Play rules but Mancini wants MORE players.
A manager needs to make the best use of his resources. The better he uses them, the better a manager he is.
A pig, on the other hand, just consumes all day. It consumes and wants more and more. Hence the expression, greedy as a pig.