Yeah puerto ricans where used as the examplary of “poverty culture” where due to their inherent culture they would breed uncontrollably and imbue traits in their children which systematically stifle their ability to “pull themselves up by their bootstraps” (it was literally called Operation Bootstrap) into higher education.
This was the era of “family planning” and neo-malthusian mania about India and Africa needing to institute a one-child policy or otherwise they would “eat up” the planet.