But the UK doesn't! That probably tells you something about the UKs relationship with the commonwealth.
Granted they have a bit of a reputation for being 'lesser' subjects. I don't really agree that everyone needs to be taught this though, most Britons don't have to 'do taxes', and aren't running companies. It should probably form a part of trades' apprenticeship training (and for all I know it does) due to the higher prevalence of self-employment (and thus running a business, and self-assessing tax even if not incorporated).