The difference between paying debts and paying them back.

Social security payment refers to the interruption of social security payment for some reason and no payment in the middle months. Underpayment refers to the completion of the social security owed in the previous period.

The social insurance plan is organized by the government, forcing a certain group to use part of its income as social insurance tax (fee) to form a social insurance fund. Under certain conditions, the insured can get fixed income or loss compensation from the fund. It is a redistribution system, and its goal is to ensure the reproduction of material and labor and social stability.