When the Fast And Furious gunwalking scandal broke, following the deaths of border agent Brian Terry and a few hundred Mexicans, President Obama said he didn't know anything about it. Attorney General Eric Holder said he didn't know anything about it either, even though records proved that Holder's immediate underlings at Justice knew about it. Subsequently, it was discovered that Holder lied to Congress about his knowledge of Fast And Furious (in spite of that, he is STILL Obama's Attorney General. Go figure).

When the Benghazi talking points were scrubbed of references to an al-Qaeda affiliated group being behind the attack, and also scrubbed of the CIA's warnings about a coming attack at Benghazi, President Obama said he had nothing to do with it. He didn't know anything about it, even though the talking points were changed 12 times, and even though CIA chief David Petraeus said the altered talking points were "essentially useless" and were the White House's call. Obama also claimed to know nothing about requests for increased security at Benghazi being denied.

The IRS has admitted to targeting conservative groups in 2011 and 2012. The IRS admitted these things, not because they are forthright and wanted to admit their "mistakes", but because they got caught. They were  about to be exposed in the agency's Inspector General (IG) report, which has not yet been released, but has been leaked to the press. Prior to the report's findings,  the IRS had denied all wrongdoing going back to 2011. From The Washington Post:

The report said the IRS targeted groups with names containing “tea party” and “patriot” and that delays occurred in processing returns of conservative applicants, said the aide, who asked to remain anonymous to discuss information that has not been released to the public.

The Executive Branch of the federal government withheld information from the public for political purposes during a presidential election. That's what happened with Benghazi, where the CIA talking points were scrubbed by the Executive Branch.

The Executive Branch of the federal government harassed members of the opposition. That's what happened when the IRS, which is under the scope of the Executive Branch (Treasury), unfairly targeted Tea Party groups prior to the 2012 presidential election.

America has economic sustainability problems.

Many say the answer is simple.