See you're conflating your stance now.
On the topic of United and most of the other 'big boys' you're referring to, we became attractive investment opportunities
after we had periods of success.
We didn't get an influx of cash and then started buying all the shiny toys, we still spent within our means and invested wisely.
Almost every business out there needs to show its worth before investors will inject more cash to help sustain it.
Also, some form of regulation was needed to stop sugar daddies over spending, because despite United, Juventus, Milan, Inter having some semblance of wealth - we still had to spend within our means, because we didn't engage in fraud, because it's illegal and immoral and only leads to corruption.
So, while FFP was misguided in it's approach and roll out, the ideology behind it makes sense.
City can spend 500m every summer for the next 10 years and it won't dent the owners' wealth at all - but it will destabilise the market and price out everyone except PSG.
What City have done to circumvent that, according to these leaks amounts to fraud and leads to corruption - and yet you're suggesting that it 'might not be above board'?
The very idea that you're trying to find some equivalence between United & City's financial history is laughably ignorant.
Finally, any small club who could dream to compete will need to be successful, elite status isn't established within a few years. It took United, Madrid, Barca, Bayern, Juventus years of winning and success to be considered elite, and they represent 0.0001% of football clubs for that very reason, eliteness isn't something to be taken lightly, and it shouldn't be something that can be bought, especially from fraudulent means.
Also, having an owner who is rich/injects cash doesn't guarantee success, see; Leeds, Malaga & Newcastle.
Imagine being okay with fraud just because some clubs are elite, jealousy must be wild