Here's the problem: those refs have been releasing books that suggest that, actually, it turns out that what fans were saying about them for years wasn't far off the mark after all
Howard Webb casually admitted in his book that Alex Ferguson gifted him a £20,000 watch, while Clattenburg mentions the full-on goodie bags he got from Bayern and Barca. That's more than enough to call their impartiality into question
And then there's Jeff Winter mentioning that Alex Ferguson barged into the official's room after their 6-3 loss to Southampton saying he would never ref a Man Utd match again - which wasn't as empty a threat as it seems, considering Winter didn't officiate a single Man Utd match for over two years after that
So no, you cannot explain how it's irrelevant
Because it isn't
I didn't include Webb as I was never that impressed, but I stand by my point that Clattenburg and Poll were better refs than the likes of Oliver & Taylor and I am sure that they get gratutities today as well. As for Winter that was hardly his fault we know that if Fergie told the FA he didn't like a ref he didn't get them at Old Trafford thats on the FA not Winter, who along with Halsey (who I dislike with a passion for invoking the play til City score rule in 99 play off final) were better refs than current batch.
I know we had issues with Clattenburg with the Battle of the Bridge and Nani scoring at OT from our free kick but in the main he was a very good ref.