To be even more fair, RMS received hundreds of thousands of dollars in prizes (MacArthur and Takeda awards just to name 2) for the work he did and as far as I can tell he plowed it all back into the FSF. I couldn't quite figure out what he was paid for his work at the FSF, but I'd be fairly surprised if it was substantially more than what he donated himself.

But the value he provides to the world is (in my opinion) more than 40x the average person.