I've served as the chair of the Conference of European Statisticians and also as the chair of the OECD statistics committee, and I've been president of the International Statistical Institute, so I have some awareness of what's happening in other countries. I can't say that it's my life's expertise.
The census in those Scandinavian countries is taking place in a completely different manner and is based on pre-existing registers, which are quite intrusive. Everybody who moves residence has to register with the police, compulsorily. Everybody who changes jobs has to have that registered, either by oneself or by the employer, compulsorily. When anybody enrols in an educational institution or leaves an educational institution, that enters a register. Income--earned and other kinds of income--enters in great detail those registers. Then, of course, once those are there, they can be brought together at relatively low cost and with a very high level of precision, because they're all based on compulsory collection.
Whether that's appropriate in Canada is not for me to say. If it were there, Statistics Canada would be very happy to use it and certainly consider how it compares with the traditional census.
What I would also say, however, is that it's very expensive if you consider it as a statistical collection. If statistics is a byproduct, then of course it's very cheap, because the data are already there; they can just be brought together for statistical purposes. But if it's put in place for the purposes of statistics, I suspect that it would be many times the cost of the census.