I don't want to get into real world stuff too much, but this has to be tackled. Because nothing is incorruptible. I see it in the real world every day.What IS a problem would be a theoretical corruption of the Federation itself.
For Trek to hit the viewers emotionally, they need to go there at some point. Then the heroes find a way to uncorrupt the Federation and people in the real world say, "We need to do that to our government."
By treating a government as incorruptible, we pretend everything will be ok even when bad people manipulate the rules for bad ends. People pretend rules magically enforce themselves when they themselves need to be the ones to enforce them.
Not naming names, but I'm horrified that governments I thought would never do certain things are gleefully doing those things. And more people need that wake up call. If the Federation going corrupt is that wakeup call to give to our audience, count me in.