Wait, maybe if there was a higher context to share our approval of the article without distracting away from its content? Like some kind of high-level rating system that was enforced through a framework of some sort and presented as a low-friction indicator of the quality of the article? We could even improve it by presenting the highest quality articles above the fold.
Of course then content that appealed to the lowest common denominator would become the most approved, and people could congregate around shared understanding and beliefs, further cementing those ideas as the "right ideas".
Only if there were some social rules that would prevent this "circle jerking" behavior that causes forums to devolve into roaming bands of up-vote brigades. We could start by not "circle jerking" about the quality of the article, we could probably go a long way toward reducing congratulatory posts that celebrate elementary-level understanding of economic systems, and in turn, encourage feel good comments that are up-voted because people agree with them instead of them actually contributing anything.