But the Canadians are obtaining content that they have paid for. They paid Netflix for content.
They cannot buy from Netflix that which Netflix has not sold them. Netflix cannot distribute in Canada things that they don't have a Canadian distribution right for. While you, and others, claim that "they paid for Netflix content", they only paid for the content that Netflix could legally sell them. And indeed, distribution of copyright material without a license is a crime.
A good analogy is a 15 year old walking into a convenience store, tossing $10 on the counter, and walking out with a case of beer. The store, while it can sell beer to some people, cannot sell beer to the minor. Because there was no sale it doesn't matter that there is a $10 bill on the counter, the minor is still stealing the beer. If the attendant takes the money to complete the transaction, he is committing a crime.
So, Netflix cannot sell Canadian residents access to the content that isn't licensed for Canada. You can't pay them for access to it, if you are in Canada.
Which is exactly why I do not consider the behavior "stealing". Netflix could cut down on 99% of this simply by tying Netflix.ca accounts to Canadian Netflix.
As you say, they choose not to do this. I can't say why, but I would guess that's because if that same account holder is in the US he can access that content because Netflix has the license to distribute it in the US -- where that Netflix customer now is.
They choose not to. I fail to see how this becomes the moral responsibility of the Canadian populace.
By itself, it doesn't. The "moral responsibility" comes in when a Canadian customer takes explicit steps to circumvent the access controls that Netflix does use to prevent distribution of material they don't have a license to distribute.
Yes, this is all "copyright", and /. people hate copyright for the most part. But it is the current law, and if you accept the idea of copyright at all (temporary monopoly on a work of art to support the production of art) then you have to accept the concept that the copyright holder can control where his works are sold. Otherwise what is the copyright other than a word? Once he sells one copy, that person can sell an infinite number of copies and pocket the profit that should go to the artist.