And what happens when those foreign workers in Solution #3 age, retire and need pension payouts…? Just keep hiring more and more foreign workers? Besides, “benefits everybody” is only from an national economic perspective. From the cultural, social and personal economic perspective, having a huge influx of foreigners in your country is terrible.

I don’t think foreign labor is completely off the mark but there has to be guards against them costing more money than they contribute to the system, which means strict culture, skill and income requirements for permanent migration.