NOT small fish.  Parts plants tend to be outsourced and offer lower-paid jobs.  The assembly/welding/paint/stamping/ and engine plants tend to be highly paid jobs.  I've worked in all kinds of plants - the workers making seats and such get paid about half as much as those in the maker branded plants.  And more and more of those parts plants are outsourced overseas and Mexico for wages a fraction as high.  For countries like Canada and the US, it really helps to keep the higher GDP per capita jobs at home, like assembly plants.  Albeit this is only stopgap ... what we really need is to get all citizens educated for skilled jobs instead of dumb vulnerable unskilled labour jobs.