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题库 / OG2015V-SC-41
Unlike a funded pension system, in which contributions are invested to pay future beneficiaries, a pay-as-you-go approach is the foundation of Social Security.
a pay-as-you-go approach is the foundation of Social Security
the foundation of Social Security is a pay-as-you-go approach
the approach of Social Security is pay-as-you-go
Social Security's approach is pay-as-you-go
Social Security is founded on a pay-as-you-go approach
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