You'll actually find that the people who own investment properties are mostly doctors and other high wage medical professionals.

But they typically only own a handful of investment properties.

The people who own dozens or hundreds of investment properties are only able to because of corruption.

Because they already had money, and hey used that money to lobby the politicians for tax incentives and loosening of regulations that allows them to bleed the economy and exploit other people more effectively like a parasite.

At least the doctors actually add value to society.