Perhaps I can answer it, but that kind of decision is within the government's authority. The question as to the rate at which a tax should be applied should be put to the House of Commons rather than in a committee.
I'll answer your first question somewhat indirectly. I've been informed that there are two cases in which property is subject to federal tax. There's the tax on capital gains. I know that personal residences are exempted from it, but it's nevertheless a tax on property. Then there's the goods and services tax, the GST, and the harmonized sales tax, the HST, which apply to new properties.