This is one of the missing links for me. I had assumed that the Sheikh owned a football club and an airline and had sponsored the former with the latter to create very high sponsorship incomes. As much as other footballer stakeholders can get all jealous about that, it is a model that brings money into football. However, it turns out the airline isn't funding 80% of it at all. It's just been posted that way in their accounts whilst the money comes directly from the Sheikh. Then City clearly non-cooperated so nobody could see the payer and payee. If it was an individual then it would be a taxable capital gain. If it is a business then it doesn't seem much different from our owners putting these £150m injections into their company. We do that, and correctly account for it. They hid it as sponsorship.
For me, this is false accounting and that is a criminal offence in our country. As football laid down some guidelines then I understand why they are investigating. What I'm still not understanding is why HMRC, The Serious Fraud Office and a bunch of forensic accountants aren't digging up 7 years worth of posted accounts and going through them with a fine tooth comb. To
@DeanoAustin point above, it makes no difference whether City are publicly traded or not to me. It is still false accounting and sits above football governance. Looking at it from a government perspective football runs on consumer spending whether it is broadcasting subscriptions or gate receipts. It is still something they should care about.
When it comes back to the word "sustainability", you can see the risk. The question becomes in 2017/18 what would have happened if City lost their owners and their sponsorship. Well their revenues were £500m and their "sponsorship" was £135m. So their organic revenue was £365m and perhaps they could have picked up normal level alternative sponsors of £50m or less. That means with the same running costs they would have posted £85m loss against whatever P&L they posted. That is massively relevant.