How do we improve our replacement rate?

The USA has a nonimmigrant replacement rate of about 1.6.

Should we pass federal legislation permitting polygamy and exemption from some federal income tax for earners starting at $200k in current dollars tied to the consumer price index? Taxability would be tied to the number of dependants under 21 reported and income levels increasing based on more dependants. For example, $150k 2 children. S225k 3 children. 300k 4 children. These families would receive no government payments. It would provide an incentive for upper middle class families to have more children.

Use this post as a conversation starter on how to fix the problem. Unassimilated immigrants are not a solution. We need more natural born Americans

Yes to some legislation like this
No legislation. Let the country fade away or into a tribal hellhole like the EU.
There is no problem with replacement rate
I have a better idea to fix the problem
I don't care
Create government breeding centers
Something else.
Select gender and age to cast your vote:
Updates
6 mo
I know the idea is deeply immoral, but this country needs to survive. And we may have to change our way of looking at things.
How do we improve our replacement rate?
Post Opinion