The low birth rate problem is indeed serious.

1. Population decline due to low birth rates
2. Infrastructure decline due to population decline
3. Increase in foreign immigration due to the decrease in native citizens
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Many people are currently watching the refugee incidents in Europe as if they are happening to someone else.
If Europe begins to strictly block refugees, those people could eventually make their way to our country.
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Some say that even if the population declines, it is fine because AI will advance,
but that only solves the production problem.
Ultimately, for infrastructure to function, consumption must occur, and AI cannot prevent the disappearance of consumers.
(Since AI doesn't eat food or ride buses and subways)