Pretty much every landlord (also developers) is out there to stab the other landlords in the back if they have the option, which they don't have. The price increase is purely driven by the availability of people who are willing to pay for the price increase and the landlords are not allowed to solve the problem.
Don't forget if nobody is renting then nobody is "destroying" the property. That's other tactic. You reconstruct everything so its "too good" to be rented cheap. This way you lower the pool of "normal" flats so their prices go up to a point where the "too good" is the only option.
It's apparent from the increasingly huge differences between rent prices. Often times the longtime landlords who own maybe one building are renting so it makes them enough money to take care of the property + good profit on side and they are happy. They don't check market prices often and are 30%+ cheaper. The rent prices are completely fabricated with no relation to running costs or price of the property.
You can do it differently when you are on the other side of the table. However you'll soon find out that most of these things are done for a reason.
Much more important question is that who has the right to live in a city. Maybe most of the people living in there, people who give that city its purpose and take care of it, want older cheaper flats.
Maybe these companies misjudged their customers and are just forcefully trying to feed on peoples need to live somewhere.
People with money are not perfect or of inherently better character, the banker that does coke on Friday is just less likely to use the floorboards as kindling compared to a junkie with more congruent background.
Username fits i guess.