I guess this is targeting landlords that just live off the rent income and/or own multiple houses
You could argue that Landlords who only live off rent money are contributing nothing to society while still having a considerable income.
In Amsterdam for example, if you have 1 property in the state you’re allowed to rent normally, but from the 2nd property on you can only make your house available for affordable rent programs (for refugees, low income families etc)
Which is cool cause it discourages people to buy multiple houses and live off rent