Toronto business and multi-res taxes are generally higher than elsewhere, when these are lower and SFH taxes raised to offset that lowering the difference is not as large as you imagine.
Also, PS, household incomes are lower in the City of Toronto than the surrounding GTA
York Region's median household income was $112,000 in 2016 vs The City of Toronto at a mere $84,000
Brampton sat at over $87,000 in 2016; while Oakville was $113,000 and change and Burlington $93,000
This idea that the average Torontonian is just loaded with disposable income is a myth.
Again, I'm pro higher taxes in the City, but when I see stuff like this, which is born out of bias and misunderstanding rather than fact, its a problem.
I don't support that idea that municipal taxation should be based on residents' disposable income, rather than the fair cost of delivering services.
But, while we're on the idea of disposable income, I might also point out that housing costs in Toronto are significantly higher than any other municipality in Ontario. So, even if Toronto has a nominally higher median household income, residents likely have less disposable income on average than most GTA municipalities.