I'm sick of hearing this 'top 4 woulda shoulda coulda' tripe. Referees don't purposely go out there and give decisions to the top 4, it's just something for other team's fans to come out and moan about when they don't get a decision.
It is ridiculous isn't it? The top 4 teams have so much more possession and chances in front of goal that it is basic probability that they are going to get the rub of the green of the decisions.
I do notice that when Arsenal, Liverpool and Chelsea that get decisions to go their way much less fuss is made as opposed to Utd.