Ms Ann-Marie O'Reilly:

If landlords are not making as much as the fella down the road, I do not think that is a good enough reason. While they may say "They'll just leave", it is hard not to hear that as "We have the power in this. We'll threaten to leave if you don't let us make more money." I am not trying to be callous in saying that but it is difficult to get to a good logical, rational reason for doing so.