The NSA has been given all that information and they haven't been able to stop a terrorist attack that was actually going to happen. They have been given near unfettered access to the communications records of millions of people and have yet failed in their goal of stopping terrorism. They have been given adequate time and materials within the law and their inability to meet the stated goals says they should not be able to make statements to the contrary.
As a general rule, I find Congress invoking a Special Prosecutor as nothing more than political theather, but maybe in this case it could produce something useful. A true independent prosecutor who could look into the abuses at the NSA and what, if any, action was taken against the bad actors may be helpful. Then again, maybe it will all be classified and nothing will happen. Yeah probably the latter.
for one, it could provide the United States and our allies early warning of international financial crises which could negatively impact the global economy.
they have the ability to guess when financial crises may be coming? Yet they failed to do anything during the mortgage bubble when American and allied banks were taking actions that could negatively impact the global economy? Here could have been a chance to justify their budget and save millions, if not billions of dollars, but they missed that as well.