Rent is devised through a point system and therefore everyone who lives in similar housing pays the same rent (more or less, I think it also has to do with how long you've been living there).
Over here in Australia the rent is based on pretty much two things; a) the mortgage of the landlord and b) what they can get away with. Not to mention the 6 month "inspections" you'll submitted to, you know, just because.
Renting in Australia seems to have a lot of emotion involved in it. If something is broken in the house it can take ages to get fixed. Not all landlord are created equal and it's very difficult to police hundred of thousands of individuals, so they get away with it. Real-estate agents are pretty much glorified banks and there mostly the serve the landlords, I mean, it's more difficult to get a landlord on your books than it is to find a tenant. I.e. path of least resistance.
Disclaimer; I haven't lived in the Netherlands for over 10 years so they might have f'd up the system just as well. In that scenario, it "was" a pretty good system.