Which IG did nothing?
Complaint filed with Treasury Inspector General
In March 2017, she filed a formal whistleblower complaint with Acting Treasury Inspector General Richard K. Delmar, who continues in that office today, she said. Beyond Delmar acknowledging receipt of the complaint, the inspector general never followed up on the matter.
This formal complaint was a follow-up to an August 2017 notification to Delmar that did not meet the full requirements of formal complaint, but it provided Delmar with the details of Treasury’s surveillance of Flynn, she said.
The whistleblower filed a subsequent complaints with the Office of Special Counsel May 2017, which is the permanent office established to work with whistleblowers and is not related to Special Counsel Robert Mueller.
I would like to see who this person Richard K. Delmar is.
From the article:
Complaint filed with Treasury Inspector General
In March 2017, she filed a formal whistleblower complaint with Acting Treasury Inspector General Richard K. Delmar, who continues in that office today, she said. Beyond Delmar acknowledging receipt of the complaint, the inspector general never followed up on the matter.
Specifically to your question, Acting Treasury Inspector General Richard K. Delmar, who continues in that office today.
The fault for all of this is Trump.
Until late 2019, Trump retained Obama’s IGs at State, FBI, DOJ, Treasury, Intelligence Community, CIA, Defense, IRS, Homeland Security (Immigration), and just about everywhere else that mattered politically.
Total incompetence or total negligence on Trump's part.
Trump needed to fire EVERYONE who was appointed by Obama and leave all the positions vacant if the Senate refused to approve verifiable Conservatives.
If a leaderless department or agency needed an executive decision, tell them to make an appointment with the president, explain the issue, and the president will decide.