Nothing will happen via Congressional “investigations”. Nothing. Even if you had the House & the Senate.
A Nuremberg style tribunal might work, but as complicit as all the governments are who would have to participate/run it, I don’t expect that to happen either.
Criminal charges will have to be brought by attorneys for those injured and those who lost loved ones. Lawyers like Thomas Renz (one great example) are working on it. Brook Jackson (whistleblower) has a good lawsuit in progress, if it’s allowed to continue ... companies are claiming gov’t knew about their fraud so that makes the fraud ‘ok’ & case should be dismissed - hopefully, the judge won’t dismiss.
I agree with a ferocious pursuit, however it happens.
Divide and conquer. Go after the most to lose first and get them to roll on others.
The guilty are going to ask for courts because without them, they'll be looking over their shoulder for the rest of their life.