Im going to be completely honest with you - I dont think it does.
He looks, talks and sometimes acts like a poor person - something this country is very good at is making people hate poor people.
Usually, its young black men. If not black then a scouser will do, is the mentality.
Think you're reading way too much into this.
Paul Scholes for example was an equally gifted player of his generation, from a working class background in a north west city. Again, equally uncomfortable in front of the media.
I don't remember people saying he was thick or deriding him for being stupid. But then again he didn't give people ammunition to think he was an idiot by getting filmed in his kitchen getting knocked out or driving birds home drunk in the early hours or getting filmed pissed while on England duty or drinking and smoking in Vegas etc etc...
People are usually judged on their actions not their social status.