A 'what if' isn't a majority, and Harper hasn't gotten one yet. More to the point, he needs the coalition of 'everybody-but-Conservatives to throw him a few votes or abstain to stay in power.
Even dumber behaviour by the coalition doesn't necessarily translate into votes for a leader so transparently manipulative and vindictive and a party so ideologically rigid.
But lets see; interesting times ahead, and the election budget to end all election budgets. Hmm Would that be a structural, a technical or a spend like the Liberals deficit. Oh yeah, sorry, the Liberals ran surpluses.