It has been suggested that this might amount to a building theme of the season.
In "Spyfall" we saw Gallifrey destroyed thanks to the arrogance of its ruling class – note that Rassilon (one of the founders of Time Lord society, resurrected and back in charge again since the Time War) and his cronies were thrown off planet by the Doctor in "Hell Bent", so assuming they didn't return in the meantime, they weren't even on-planet to receive the Master's punishment despite the fact that they are the ones most deserving, while the Shobogans out in the wildlands probably all died.
Now in "Orphan 55", we see Earth destroyed thanks the arrogance of its ruling class – somebody said that the rich people who had created this environment didn't bother trying to fix the planet before it was too late because they could just leave to go somewhere else, and the less rich and less punishment-worthy were left behind to turn into scientifically implausible rage monsters.
Two points don't necessarily make a pattern, but the similarities are striking...
.
Thanks for another great reply! As a theory, it holds enough weight not to be summarily dismissed, and you could consider it something of a step up in scale from one of the apparent themes of season 11. If nothing else, Chibnall seems determined never to let us forget just how epically lousy people can be.