The crux of this tactic is that US political leaders pretend to validate and even channel public anger by acknowledging that there are "serious questions that have been raised." They vow changes to fix the system and ensure these problems never happen again. And they then set out, with their actions, to do exactly the opposite: to make the system prettier and more politically palatable with empty, cosmetic "reforms" so as to placate public anger while leaving the system fundamentally unchanged, even more immune than before to serious challenge.
This scam has been so frequently used that it is now easily recognizable. In the mid-1970s, the Senate uncovered surveillance abuses that had been ongoing for decades, generating widespread public fury. In response, the US Congress enacted a new law (FISA) which featured two primary "safeguards": a requirement of judicial review for any domestic surveillance, and newly created committees to ensure legal compliance by the intelligence community.