I disagree that this is essentially an emotional problem. This is essentially an inequality problem; the inequality (unsurprisingly) breeds resentment, and trying to fix the resentment without fixing the inequality is just slapping a bandage over a sucking chest wound.
[1]: https://www.cgdev.org/blog/world-bank-poverty-statistics-lac... [2]: https://data.oecd.org/inequality/income-inequality.htm
But more importantly, I don't really care if a few people are slightly less motivated if it means that we can unlock the massive amount of latent human potential currently wasted in poverty, hunger, and desperation. The number of people like that would be massively outweighed by the people who aren't scrabbling just to survive, and whose intelligence and work ethic could instead be turned to learning and building the future.