Class traitors are every bit as helpful, it’s just a thing where due to circumstance, it’s not as expected that someone well-off will join a revolutionary cause against the furthering of their own position in class.

But also, I don’t think having their own house makes them rich. It means they have a bit more to fear losing than some in a societal upheaval, but if they have to work to make a living, they are still working class. It’s more the ones who own and rent out multiple properties, who own loads of stock, etc., who I’d expect are unlikely to ever change their ways and support a revolution, because their wealth is directly tied into the capitalist financial system and its exploitation.

Either way, you could be Bill Gates level of wealth background and still become a socialist. Unlikely if you were from a background that wealthy, but it’s not impossible.