Earlier quoted context omitted.
Land lords still exist in a competitive market and can't arbitrarily raise rents without collusion. One way to alleviate this problem is to have a harsher tax on vacant properties to punish using housing as a store of value and creating artificial scarcity in the market, e.g. like how the DeBeers corporation made diamonds artificially scarce and scammed the world for the past century selling a shiny rock.
> Land lords still exist in a competitive market and can't arbitrarily raise rents without collusion. Well...kind of. It's pretty bad in a lot of places. There aren't enough homes in the places people want to live.
There's a delicate balance of property owners using their power to prevent new construction and densification in an attempt to keep their property values high by preventing competition and going too far where you destroy your local economy because the people who actually do the work can't afford to live there.