Harper brought in income splitting for taxation purposes, last year it saved us about $2000. This year due to the tax calculations being so mind boggling I let H & R Bloch do it for us and to my relief found we're saving $1800 this year. Obviously it works best where there is a disparity between the income levels of the spouses, which is our case. For this reason alone I'd be very reluctant to get rid of Harper.
FYI, during the English election debate, when Liz May brought up the issue of splitting of all income, Harper opposed it on th egrounds that it would lose too much revenue. Of course to be fair to Harper, he also didn't support a gas tax, whereas May did, so the Greens could have compensated whereas the Conservatives had no other source of income to go on.
Personally though, I'd say the Green policy was more conservative than the Conservative one in some respects. At least a gas tax is user-oay. You don't want to pay the tax, don't buy the gas. With income taxes, there is no way to squirm arond it. You need an income after all.