That would already be a whole lot better, actually! Good idea. I wonder if that would lead people to write unnecessarily long posts, though. You see, I can add a run-on sentence to the end of this paragraph that doesn't really add much to the point I am making, it just increases the amount of text in my post as if I were writing a school essay with a minimum word count and if we stick to that analogy, then more words would mean a higher grade and that seems a little unfair as well
This is exactly what happened with the old system! A top bell earner system would actually fix that, because it wouldn't count basement posts at all, and bumps would only give you a minimal amount of bells. Still wouldn't fix the issue with long posts for the sake of long posts though...
Maybe they decided not to bring it back specifically because people have always done that?

I also remember reading that the basement is not supposed to be for meaningless posts and more for having fun together. I don't know exactly how it was written but the basement isn't a lawless wasteland and there have actually been threads locked by mods for not having a purpose.