It's not so much about morals as about the power that the governments have over the people they are spying on. I think it's wrong for the US gov to spy on Canadian citizens living outside the US. But the fact is the US gov has no power over those Canadian citizens outside the US. Whereas the US gov has a great deal of authority over US citizens, or foreign nationals living on US soil, and therefore the information gathered through mass surveillance becomes a much more dangerous weapon.