How would you define corrupt?
Not necessarily disagreeing with all you say just wondering where your parameters of corrupt judges lie.
It's a hard one to define. Like the Chocolatito v Estrada fight was called corrupt judging but I don't necessarily agree as I could see arguments for both winners, Chocolatito was the winner in my eyes but it wasn't massively clear. When one scorecard is massively in favour of a fighter when it shouldn't be, then it has to be questioned.
I read an article that all these judges are invited to the sanctioning bodies events in Miami, Cancun, Vegas etc. They are friends with the promoters and the head of the bodies. Naturally, they want to remain within these circles, so there's a suggestion they will always favour the 'home' fighter, as it means more money for sanctioning bodies/promoters.
I think it would be quite easy to manipulate a judge into scoring a fight one way. It's not just this one fight, it's been happening for a long time now.