From Follow-up on Dually Entitled Beneficiaries and Family Maximum Provisions, a report by Social Security’s Inspector General:
… This is a follow up to our 2014 audit of the Adjustment of Monthly Benefits Under the Family Maximum Provisions. For our current audit, we identified 23,603 Social Security records with dually entitled beneficiaries and at least 2 other beneficiaries who had a date of entitlement of May 2013 or later and were in current pay status as of May 2023. We selected a random sample of 225 records for review. …
We estimate SSA correctly adjusted benefits in accordance with the family maximum provisions for 15,211 of the 23,603 wage earners’ records in our population (64 percent); however, SSA improperly paid approximately $114 million to spouses and children on 8,392 wage earners’ records (36 percent). …