3% was the top annual pay increase at the Fortune 500 company I used to work at. 3% max increase for those that "exceeded all expectations". Probably less than 1/3 of employees.
So if it's good enough for a Fortune 500 company, it's good enough for every landlord. 3% max, and only to max 1/3 of their locations/rooms.
This is the truth. You need to create conditions that make renting unprofitable and unsustainable, and all of a sudden property prices will begin to fall as landlords sell. This happened in London after WW2, when renting was over-regulated and most of the residents ended up owning their own apartments as landlords sold off property. After deregulation, the reverse trend began again.