There are two reasons. First of all, there's no evidence that there is mass surveillance. The other element is the cost.
One way to evaluate how possible or plausible it is that a technology has been deployed is to go with a cost analysis. Just one operation will easily reach half a million dollars. That's just to make one interception on one target with maybe one device only. It takes a lot of time and a lot of resources to install the software, monitor the software, debrief on the software and sometimes translate the language or the information that is there. When you add it up, at the end of the day there is a simple calculation of budget and we're not able to deploy that abundantly because it's too expensive.
Turning to what Mr. Snowden revealed of NSA capability, it's like talking apples and oranges. The NSA has budgets, capability and intentions that are way different from what the RCMP,CSIS or DND is capable of deploying here in Canada.