Everyone knows that much.
You wouldn't get that impression that from reading a lot of these comments. Or at least I often don't see it. Many are simply focused on "their" post rewards, or things like not making people feel bad by getting downvoted*, etc. and don't consider the bigger picture or think it matters.
* I'm not saying that people feeling bad is entirely insignificant, but when the question comes down to one of working vs. not working economically, that matters more, and no matter where you come down on this question the problem is that I often don't even see people willing to ask it.