I think it's harsh to say the main superpower is being loaded. Of course I agree it's necessary given the inequality in the game. It's basically impossible for a non established club to consistently get further than say, where Brighton are now, without a sugar daddy.
But at the same time, United have consistently outsspent City in the last decade. If they'd been run properly, the way Liverpool were, we'd never have dominated to much. City are 11th now in the net spend over the last 5 years. Likewise Chelsea have hardly skimped, and Liverpool for all Klopp's "we can't compete" shtick are not far behind.
The main superpower has been alignment on strategy from top to bottom and consistent execution on that strategy. Gradually over time they've added better and better people (on and off the pitch) until they've ended up with a collection of extreme outlying talent like Guardiola, De Bruyne and Haaland. This isn't just spaffing cash: when top talent has wanted more money or playing time than City thought it was worth, they've consistently walked away. That's why Sterling is at Chelsea, Maguire and Fred are at United and Jesus and Zinchenko are at Arsenal.
It's lazy to just say "oh City just spend money" when your own club spaffed £100m up the wall on Lukaku. It just comes across as "oh it's not fair because we made an avoidable mistake"
But yeah you're not going to always get rational responses on here either, some people see conspiracy round every corner.