The only one to blame here is Steve Murphy of CTV. There is a major grammatical error in his question, "if you were PM now, what would you have done about the economy and this crisis that Mr. Harper hasn't done?"
The question should be:
(1) If you were PM now, what would you do?
(2) If you had been PM, what woudl you have done about the economy and this crisis that Mr. Harper hasn't done?