Earlier quoted context omitted.
> mother and children live in Canada When these children grow up - they will pay taxes in Canada. It looks like a good deal for Canada. Even if father's income is taxed in Hong Kong only.
It isn't a good deal for Canadians because we can get immigrants that will contribute to Canada, pay taxes, and have children who will do the same. And many of the children of Hk immigrants will go back to HK to earn more money. They will do whatever is in their best interest.
Just like every other living being