In Ontario at 100k your marginal tax rate is 43%.

You get a 10,000 raise you get 5,700.

Not exactly 50% but pretty close. Add in a healthcare levy at $900 or less and things are getting closer.

Marginal tax gets above 50% pretty quickly. For example Ontario takes a bit about 200k a year to get >50%. For average tax rate yes you’ll need a lot more. 800k a year gets you pretty close at 49.1%. Sounds like a lot but that’s “only” 600k usd at today’s exchange rate. High but in the ball park of a staff level engineer at Facebook or google.

Federal higher income bracket is not 50% but you have to factor the province as well so yeah well above 50% in Quebec for instance.