Will correct this post slightly, as I had an MA SSHRC this year at Queen's! Without any external funding my department guarantees 18 000$/year to MA students through a variety of internal fellowships/TAships etc. Getting a SSHRC bumps you up to 24 000$, or OGS gets you 21 000$. In any case, it's much better than a lot of universities, though there is definitely a significant 'claw back'.