It appears that the saturation point has been reached in this particular market; that is the number of people with the disposable income to patronize these establishments has been met or exceeded and increasing prices given the large number of competitors is not an option.

In order to improve profit margins restaurant owners seem to believe that the primary solution is to drive down wage costs using temporary foreign workers.  
In such a case taxpayers will have to underwrite the social supports required for these employees who won't be able to survive without them in a high cost city; this is unacceptable.

There will certainly be attrition in this industry and those who survive will find creative ways to attract customers and to find ways to improve working conditions and wages.

The fittest will survive and prosper; ain't that how capitalism is supposed to work?