Other than a cross-comparison of data, I don't see how they would be gleaning whether or not somebody is cheating on their taxes from this information. It mystifies me as to why they would do this.
For Mr. Jacksch, you say that the sky is not falling, and law-abiding citizens don't have anything to worry about in terms of their information being safeguarded or misused by Canadian or American agencies. However, we see, such as with NATO, that they fend off over 500 cyber-attacks a month. The Pentagon is always fending them off.
Now we don't know about the ones they're not able to fend off. They're kept in-house, of course. Even here at the House of Commons, we will from time to time lose all our connectivity because they've been rendered helpless until they reboot the system and clean out the malware.
Given that not only is it a segregated computer system but that we're living in the Internet of things, how can you be so confident that individuals' information is totally protected?