The puzzle is why she did not give far more emphasis to that work going on behind the scenes - instead of giving the impression she was sitting back and waiting for the royal commission's recommendations before acting.
The explanation is bureaucratic: that while her department's performance was subject to review and subsequent recommendations were made to the Cabinet, she could say little.
Another explanation is more political: that Wilkinson did not want the focus to shift to her department's practice and record regarding mine safety in recent years - especially given there was just one lone inspector when Pike River suffered its devastating explosions.
She may also have wanted to quietly restructure the way in which her department went about mine safety - rather than have the royal commission do it for her.
The remaining explanation is that she was leaned on from above.
The Prime Minister's stocks rose even higher after his handling of Pike River. So far the Government has escaped blame for the tragedy.
The royal commission's findings may alter that. Better then to straighten things out in advance.
More likely, however, this is less a case of Beehive conspiracy and more one of the absence of political nous on the part of an occasionally accident-prone minister.