The demographics of America might change if married mothers got a substantial tax cut. For many citizens, this would not matter — they don’t pay taxes, so the tax cut is null. But productive, tax-paying Americans would have an incentive to have more children.
https://www.population-security.org/rockefeller/001_population_growth_and_the_american_future.htm
March 27, 1972
To the President and Congress of the United States:
I have the honor to transmit for your consideration the Final Report, containing the findings and recommendations, of the Commission on Population Growth and the American Future, pursuant to Sec. 8, PL 91-213.
After two years of concentrated effort, we have concluded that, in the long run, no substantial benefits will result from further growth of the Nation’s population, rather that the gradual stabilization of our population through voluntary means would contribute significantly to the Nation’s ability to solve its problems. We have looked for, and have not found, any convincing economic argument for continued population growth. The health of our country does not depend on it, nor does the vitality of business nor the welfare of the average person.
The recommendations offered by this Commission are directed towards increasing public knowledge of the causes and consequences of population change, facilitating and guiding the processes of population movement, maximizing information about human reproduction and its consequences for the family, and enabling individuals to avoid unwanted fertility.
To these ends we offer this report in the hope that our findings and recommendations will stimulate serious consideration of an issue that is of great consequence to present and future generations.
Respectfully submitted for the Commission,
John D. Rockefeller 3rd
Chairman