It's not the quantity / size of pie. It's the fact that the Canadian labour market has explicit "escape valves" for "skilled labour is too expensive" built in as a policy plank in the form of the LMIA and TFW process.
They are tools that "industry" lobbied for expansion of, and got. Have persisted through both Conservative and Liberal governments for decades, but was expanded markedly under both Harper and (especially) Trudeau.
