If I wish to contribute to the income of an automaker I will purchase their product and not do so through my taxes.  Corporate shakedowns of this nature have to stop and it is the governments responsibility to do so.   It is particularly galling that these supports come without equity in the companies.

I suspect that these investments are strategic and would have been made without government support. 
What other reason could there be if these endevours could have been carried out satisfactorily in lower cost jurisdictions?  

It should be made clear to the automakers that if they fail to provide a reasonable number of jobs in Canada they will face penalties.