Ultimately, you are doing the best you can given the allocation of resources based on the targeted immigration profile. We have control over that despite the restrictions you are referring to. Obviously, there is more or less control as far as applications are concerned. You may get a series of applications from one given country because Canada is popular there.
The length of the line-up, in the end, represents the gap between the type of immigrants we are seeking and the number of immigrants from that given country who want to come to Canada. So, this line-up is not solely caused by reasons beyond your control. It is also a result of the immigration profile we are seeking, or that the department is seeking, for Canada.