If you're non-resident in Canada, you only have to pay tax in Canada on Canadian-source income. Unfortunately, yes that includes a pension.
To be non-resident you have to spend at least half the year outside the country and have no residential ties to Canada like property, dependents, bank accounts, health insurance, etc.
To be non-resident you have to spend at least half the year outside the country and have no residential ties to Canada like property, dependents, bank accounts, health insurance, etc.
See: http://www.cra-arc.gc.ca/tx/nnrsdnts/ndvdls/nnrs-eng.html