I feel like this is probably pretty effective. I feel like it should be a thing.
It isn't. They will simply import women from other countries. And this election alone proves the fact that all women are not a monolithic group. You're not going to get a majority to follow this trend.
It seems to have had the desired effect elsewhere. Also I'm not sure if it's required for women to be a monolithic group. This assumption is based on the gender divide in the current election. Regardless, Trump's policies are going to have a natural impact and decreasing birth rate just due to financial strain so if there are multiple factors that are impacting the numbers that's all the better right?
What common features would there need to be in order for it to work in the US? Seems that being patriarchal, traditionalist, conformist and capitalist would suffice.
Well, I'm pretty sure you're right about South Korea. I don't see that as a reason not to try though. I can only hope that you're wrong about America. I appreciate the insight.
E: Even if it isn't super effective, every little bit helps.