AOC also doesn't say anything about "moral", etc. You can behave perfectly morally in US society and "earn" a billion dollars. It is just that, no matter what exactly you did, you didn't actually "earn" it.
Of course pg is smart enough to understand that there are two different meanings of "earn" at play here. It is just that he chooses to ignore the second one, because the second one is hard to define exactly, and it puts him out of his comfort zone. He likes being right more than finding the truth (like most of us), and so ignoring the second meaning is the easy way out.
The trouble is, just because something is difficult to define, doesn't mean it isn't essential, or important.