Money isn’t fundamentally a zero sum game like it seems on the surface… rich peoples wealth is invested, and gets used by less wealthy people to also create value - they might say draw a salary supported by a business loan, or mortgage a house.

You're quite correct - but poor people's money also does that. Rich people's wealth is generally less productive in being accessible for loans since it's generally tied up in speculative investments... compared to less well off folks that are more likely to have a pile of cash in a bank account.

good point, assets aren't infinite.

That is exactly the point "the landlords game" - the original monopoly was made to demonstrate.