At least the people in this administration are consistent. Whenever confronted with the option of admitting they are evil versus admitting they are incompetent, they opt for incompetence. Funny. By sheer coincidence, incompetence doesn't seem to be impeachable, whereas evil is.
I'm not sure it is incompetence. All of those missing emails on the IRS servers went someplace else, and it is those that tell part of this tale as well. This is not evil, and it is not incompetence. This is deliberate damage control and obfuscation. The more time that passes, the dimmer these events appear and are more easily manipulated with political spin.
Drag it out as long as possible, flood the investigators with as much useless paper as possible, brag about how many tens of thousands of pages of "data" you have released, and double-damn the Republicans for buying so much wasted paper with the hardworking taxpayer's dollar...
So it goes, deliberately.