In my opinion, there’s no corruption but there is bias. Mainly unconscious bias at that.
If you’re an official and you keep being told that despite City being great, the reason they’re great is due to cheating and you’re hearing this every time City are mentioned. Win, lose or draw.
As well as that, you’ve been brought up hearing how wonderful the redshirts are and how their history defines all that’s good about football. The press, of course, constantly reinforces this.
Maybe, just maybe, when there’s a debatable decision to be made, you err on the side of those history clubs and err against the oil money, no history, empty seat, 115 times cheats. Not my words to be clear where I stand, but the way it’s portrayed.
That’s my opinion about how all these, little and big, decisions can go the way they do.