I found this, it's about the data broker loophole. The problem is, in the US we have 4th Amendment protection against warantless searches. Many other nations, have a similar right, by another name. Canada has Section 8 of the Charter of Rights and Freedoms.

These are more and more bypassed by data brokers. The government purchases data from data brokers. Data it could not get without a warant in the past.

Maybe this is not as much a problem yet in Canada as in the US? I'm not sure, hope some Canadians can say how it is? But here in the US, it's a massive prob now.

Related: We Built a Surveillance State: What Now?