SSB免稅主要幫中產，上中產占點光，40%美國老人唯一收入是SSB，這些人本來就不交聯邦收入稅，川普想用關稅減一些收入稅

New Report: 40% of Older Americans Rely Solely on Social Security for Retirement Income

 

https://www.nirsonline.org/2020/01/new-report-40-of-older-americans-rely-solely-on-social-security-for-retirement-income/