--I would go for Ontario with fists flailing.
The other provinces are doing fine and dandy with their provincial nominee programs, including the separate Quebec program, which is fantastic. It works.
Other than that, just do a little more monitoring control, simple things such as linking databases, which is a little controversial. If your deductions at source 90 days after arrival don't match what you said to the federal government or the provincial government to get your selection, flag the file, bring them in. Little things....