>the only way to "fix" the birth rate is to reject humanity (education, urbanization, technology) and retvrn to monke (subsistence farming, arranged marriages, illiteracy, superstition), which no civilized country will ever do.

They won't do it willingly. That just means it will happen without their input.

sure, they could, hypothetically, close the borders and begin a campaign of forced insemination, but those babies would have no fathers to provide for them, and the state - any state - really resents footing the bill for child rearing, going as far as forcing victims of infidelity, fraud, or rape to pay child support. the state - any state - wants to give you as little as possible and to take as much as possible from you, for the delta between giving and receiving is its lifeblood.

the ideal family has two full-time working parents, paying a mortgage and car loans, consuming as many high-margin domestic products as possible, rearing as many children (future laborers and consumers) as possible, with little to no assistance from the state. and you simply can't have that by force. if you could, you might as well drop the pretense and openly treat your population as slaves.