Staying with examples in Alberta, Chinese restaurants are not in the imported labor coterie. Members of the 100,000 strong group staff not only our Chinese restaurants, but are in every business, educational and cultural endeavor in the province.
No dormitories here; they live in every community and make excellent neighbours.
And all are either citizens or landed immigrants or have visa status at university, etc.

The same is true of the other groups here, whether from UK or Ethiopia.

My point was that certain jobs like cleaning cannot depend on citizens or most landed immigrants.
Certain other jobs are not wanted by the established populace; slaughterhouse work being an example. The Somalis doing the labour are paid well and are landed immigrants or already citizens if they have completed the residence requirement.