I might be out of touch, my read on Toronto some 14 years ago was that the city was dominated (at arms length) by the Toronto TSX - the single largest mineral resources exchange on the globe.
Mining mining was behind large law and accounting firms, underpinning the professional service layers, and driving the demand for high end mansions, out of town el ranchos, tax write off hobby projects for spouses etc.
On a pie chart for cash flow I'm guessing minerals and energy are still the big tickets there?