It's expensive to pay first world workers with modern worker rights and work safety regulations in Canada .... and heaven forbid if they are unionized workers.
It's cheaper to export the raw materials to a country with cheap labor, few or no worker laws and lax safety regulations ... and definitely no unionized labor.
The government wants to build the nation .... by allowing companies to skirt as many laws as possible to maximize profits and build the nation's businesses and corporations in the vain hope that these companies will actually share their profits and benefits.