Seems suspicious that such high failure rates for the system just happen to coincide with that period of time and those people. If it was cheap hardware you would expect other systems not involved in the scandal to suffer similar failure rates. That they are not points to these failures as not being failures but deliberate criminal obstruction.
The surest guarantee of a hard drive crash for 2011-2014 by an IRS official and/or loss of an email backup is to be subpoenaed by Congress today.