You have a fundamentally flawed view of what wealth is. Well isn’t a thing. It’s not like there’s a limited amount of wealthonium in the world and whoever holds it gets it and nobody else does. That’s not how it works.
Wealth is created through activity. Without the activity there is no wealth. Therefore the supply of wealth is endless, the problems usually come with limits or issues with the activity
This is silly. Wealth is not zero sum, but it's also not infinite. The reality is, Canada's economy will grow (assuming no recession) 0-3% in any given year, maybe 4-5% if it's a real barn burner of a year. If the top wealth bracket's wealth grows at a rate larger than that, it's because they are taking resources from the rest of us who's wealth did not grow at that rate.
So yes, increasing wealth inequality is the issue. Neoclassical economics might as well be astrology for all dumb assumptions it makes.