Pension benefit level to be maintained at 54.7% of current workers’ income: Ministry of Health, Labour and Welfare reform proposal
[Asahi.com 2003/11/17]
It seems to me that, if Japan’s pension system cannot escape the pay-as-you-go model, why not make pension amounts vary according to the number of children? The pay-as-you-go system breaks down when the birthrate falls, as it has in Japan today.
Specifically:
Basic portion + additional amount × number of children
Naturally, the basic portion should be kept as small as possible and the additional portion made large.
With this, people would try to have more children. Couples who cannot have children, and people who prefer to remain single, could adopt. Since increasing the number of children would basically solve the pension problem, this seems like a good approach.
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