It could have something to do with this, which controls how fast the money supply increases, and how much your paychecks purchasing power needs to be debased via monetary inflation. If things get shittier and living standards fall it doesnt really take that into account and is considered out of scope.

https://www.statcan.gc.ca/en/subjects-start/prices_and_price_indexes/consumer_price_indexes/faq

Is the CPI a cost of living index?

The Consumer Price Index (CPI) is not equivalent to a cost-of-living index (COLI). The CPI has often been used to approximate cost-of-living but it is important to note that the CPI and COLI are not directly comparable.

The CPI is based on a fixed basket of goods and services, which represents the average Canadian household's spending habits. The CPI measures the average change in retail prices encountered by all consumers in Canada. By contrast, the objective of a COLI is to measure price changes experienced by consumers in maintaining a constant standard of living. A COLI can be linked to the notion of the minimum amount of money that would be necessary in different periods of time to ensure a given level of "well-being".

In short, the CPI measures the change in the cost of a fixed basket of goods and services, whereas a COLI measures the change in the cost of a fixed level of "well-being".