It would be more effective to show analytics in the curation rewards tab so that people who check their curation rewards realize that it's not the largest posts voted on the late that land them the most money. For things to be easy to compare, they need to be normalized. Columns in the table would be:
1) position in the stake heap in % of total stake that voted on the post
2) position in the accrued SBD in % of total SBD earned by the post
3) curation reward in % of the total curation reward paid
4) curation reward in SP
5) voting time in minutes since posting

This should be enough for people to realize that finding unloved posts with potential where they end up being at the very bottom of the stake heap or closest as possible to 30mn or ideally both pays way more than herding behind already trending posts way past the initial 30mn. Naturally, people will realize that they are better off focusing more on new posts.

I don't think however that anything other than education / analysis tools should be done to force people to behave one way or another wrt to voting. Let's let stimulus, price control, and market regulation to central banks and financial regulators. Everyone will benefit much more from receiving basic education about curation mechanics, and they will be able to apply that in many other areas where the very same holds true like picking stocks.