exemption: government employee paying Social Security taxes

你所的可能是很久以前工作的人，我們這種工作了10來年的，都是交ssn

http://www.socialsecurity.gov/retire2/gpo.htm

If you receive a pension from a government job in which you did not pay Social Security taxes, some or all of your Social Security spouse's, widow's or widower's benefit may be offset due to receipt of that pension.

Some individuals are exempt from the offset. Generally, your Social Security benefits as a spouse, widow or widower will not be reduced if you:
?Are receiving a government pension that is not based on your earnings; or
?Are a federal (including Civil Service Offset), state or local government employee whose government pension is based on a job where you were paying Social Security taxes; and