如果有pension，SSB会减少

https://www.nerdwallet.com/article/investing/social-security/retiring-with-pension-social-security#:~:text=If%20you%20have%20a%20covered,reduce%20your%20Social%20Security%20benefits.&text=Social%20Security%20Administration.,Accessed%20Nov%2020%2C%202023.