Granted, I’m an American and I’ve had a couple glasses of wine tonight, but I’ve read this comment like 8 times and it still makes no sense to me.
You can look at random things like groceries, homes or car insurance to see that this isn't really true. 600 USD (or even 600 CAD) goes a heck of a lot further in most of the USA.
[1] Guess but not complete wild-guess multipliers
The ideal situation is you get a remote job in Canada for 1x salary and live in a nice place with 0.3x houses. That is my current setup.