Essentially, across this country it has been accepted that social benefits have an 11-month period of retroactivity. You have cited the case of the Quebec Pension Plan, which provides five years of retroactivity; that's really the exception to the rule. Even in Quebec, for example, many social benefits have no retroactivity at all. I mean, social assistance means that you get it and you get nothing retroactively.
That's pretty much the way things are done across the country and in fact around the world--that notion of about one year's worth of retroactive payments.