I highly doubt the average canadian standard of living is higher than the average in countries like Switzerland, the scandinavian countries and some other well developed countries. They all have better social services, better access to public transit. Finland almost comepletely solved homelessness. We might still be in the top 10, but I doubt the top 3.

Edit: it can be difficult to gauge exactly how to measure QOL. This website tries to break down a few different metrics. Canada has a high QOL when reading US based news, otherwise well developed European countries dominate the list.