While I agree, to a point, it is like the auto industry. CUSMA allowed parts to be made in the cheapest way possible. Moving it all into once place defeats the production line, one plant can be focused on the dew hikey of many different types of jets while another can be focused on the thing a ma bob of many different types of jets while another can be focused on the assembly of a certain type of Jet.

In the modern world we depend on just in time production, having one plant do one thing is a failure in the system. If we had many plants in Canada I could agree that it should be done all in Canada but that is a failure in the modern production line.