The cost of living is higher. Medical expenses aren't really a thing for recent grads, and good medical insurance limits your outlay. Normally most people with solid insurance and serious health concerns will max out at a few thousand dollars a year. And for the kinds of jobs we are talking about, that isn't a big deal.

Anyways, I'm making way beyond 2x as much as I ever could have in Canada. Also I get to work on world class tech, with world class people. And when I changes jobs, I don't have to take major compromises. There are way more high quality employers in the bay area than anywhere else for technology!