There is no unsustainable progression driving the mechanism of a pay-as-you-go pension system and so it is not a pyramid or Ponzi scheme.
量入为出系统里面并不存在不可持续的进程，因此它不是庞氏或金字塔式骗局。
There is no unsustainable progression driving the mechanism of a pay-as-you-go pension system and so it is not a pyramid or Ponzi scheme.
量入为出系统里面并不存在不可持续的进程，因此它不是庞氏或金字塔式骗局。
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