Here's where your thinking goes askew, you can't simply draw a boundary around a subset of people and declare that an agentic thing. Groups of people don't have guilt or automatic responsibility, only individuals do.
Thinking of very diverse groups of people as single entities is how you get sentiments like "Muslims did 9/11 and they must pay" without considering that the tendency-towards-9/11-ness might not carry over to the entire set of "Muslims". Less than half of Americans were even alive in 1971 and no one is alive from the days of US slavery.
Thinking "those who have inherited benefits due to negative treatment of African Americans should transfer wealth to the descendents of those African Americans" is a separate idea to race based affirmative action. Race based AA would see the children of a pair of Ukrainian immigrants put below the children of a pair of Ethiopian immigrants, even though neither group has anything to do with slavery.
This is not exactly correct. Governments are composed of groups of people and governments maintain continuity of responsibility even when all the people in that government are different. Black Americans were discriminated against as a matter of state and federal policy and thus both state and federal government is at fault for the treatment of Black American. There is clear precedent in American law that in such cases, harmed individuals and groups are due financial compensation. Precedent for financial compensation due to government abuse of power is an incredibly old precedent and the only reason Black Americans haven't been compensated for the discrimination they've suffered is because the continuation of racism, the tradition of discrimination and the sheer size of the problem have turned what should be a fairly straightforward legal case into a complicated political question.
And an FBI lawyer pleaded guilty to a felony for forging an email used as justification for the wiretapping [2].
[0] - https://www.nationalreview.com/news/fisa-court-confirms-two-...
[1] - https://www.nationalreview.com/news/ig-report-details-signif...
[2] - https://www.reuters.com/legal/government/ex-fbi-lawyer-agree...