That's a very interesting question.
I think this is generally true for all fields of science, including what Dr. McDonald talked about. I believe that Canada needs to develop some sort of unique facility with unique capabilities that bring an international interest so that people trained elsewhere can come to Canada to work or Canadians will have a place to work.
Such a facility should be strongly advertised, provide internships to graduate and undergraduate students and provide clear long-term career paths so that you could stay in the field of plasma physics and continue contributing to it while staying in Canada. This is effectively the model of the national laboratories in the United States, which hire a significant fraction of graduate students from many areas of science.