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That's a good observation. Well, I see posting fees as a useful filter, but not the main cure. Higher fees might reduce low-value posts, but they can also discourage new voices who could grow into valuable contributors with the right guidance. @DarthCoin is very good at guiding the right path where fiat-mindset naturally vanishes through the power of learning.
The deeper fix is cultural—getting people to understand that SN isn’t about “pay to play” or “earn for free,” it’s about proof of work. If users approach SN as a place to sharpen thinking, build trust, and create value, the incentive naturally aligns. Fees then become a small friction that rewards intentionality rather than a gate that just blocks entry. So, yes, "make them pay".
If the mindset stay fiat-minded, people will still try to game the system—whether fees is 1 sat or 1,000 sats. Change the culture, and the fees simply help amplify it.