Earlier quoted context omitted.
Landlords can't simply arbitrarily raise rents like that. If they could, they would already charge every individual tenant 100% of their income. Renting is a market like any other, and markets have limits and competition. The renters that do try to increase rent by $1000 will simply not have tenants anymore, and those that didn't, would, because UBI means people can basically move anywhere, any time they like.
It’s not “arbitrary.” It’s raising rents for the same reason rents are ever raised: people’s willingness/ability to pay has gone up. That can happen because of a new subway station, a hot new employer nearby, or simply because money appeared in their pockets. If money were no object, more people would live in high COL areas, not fewer. You know this is true because you see it in the prices. To prevent rent increases…
The assumption that all rents, everywhere, would go up by the amount of UBI is the definition of "arbitrary."