Layla4 brought up the tax credits in her post above.

When Harper banned the per vote subsidy, he claimed that it was because "taxpayers should not be forced to subsidies political parties".     Yet, he left the far more costly tax credits in place.    THAT makes Harper relevant.    His reasoning was not truthful.   In fact, he wanted to cripple the other parties since the CPC (at the time) had a fundraising advantage.

So long as the CPC and its supporters remain the party of Harper, then Harper will be relevant.