“Ineffective management” is to blame for the Internal Revenue Services’ political targeting of conservative groups, according to the Treasury Inspector General for Tax Administration’s year-long investigation into the matter.

The TIGTA report found that the IRS used “inappropriate criteria” to scrutinize conservative groups and allowed said criteria to remain in place for at least 18 months.

The following chart details the evolution of the IRS’ poltical targeting:

Heres the IGs Investigative Report on the IRS Abuse of Conservative GroupsBut the overall takeaway, according to the report, is that “ineffective management” is really to blame for the agency’s anti-conservative discrimination.

Yep, just plain, old poor management allowed agency employees to harass conservative groups with “substantial delays” and often “unnecessary” information requests.

Here are seven unnecessary questions the IRS asked conservative groups that it had flagged for additional review [as identified by TIGTA]:

Heres the IGs Investigative Report on the IRS Abuse of Conservative Groups

The IG report notes that the IRS has taken steps to fix its anti-conservative problems, but adds that much more needs to be done so that “the public has reasonable assurance that applications are process without unreasonable delay in a fair and impartial manner.”

In fact, the report clearly states that “corrective action has not been fully implemented.”

Here’s a copy of the IG report:

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Featured image courtesy Getty Images. This post has been updated.