Solution you proffer isn't going to cut it as government did not have any power on Landlords and that's why they have kept quiet and shying away from addressing these rent issues.
Everything we do in this country we do it on our own as government has left their responsibilities to some few greedy folks that are making money off it.
If you build in Lagos, which is the most frustrating place to build, permits alone is killing not to talk of stress involved.

Nothing is properly regulated in this country from the sand and gravel, look at the price of cement that most of its ingredients are locally sourced in the country to house fittings. To do roofing alone not matter how small runs into hundreds of thousands and mind you the water for the house will equally be provided by Landlord so how will government intervene?
Is just about buying and selling and to be honest Landlords are always at the receiving end.

To build good, modern 1room apartment now, stand alone apartment for illustration purpose, you will need nothing less than 800k(conservatively) and this same landlord will rent it out says 130k/annum which means it will take him more than 6years to recover his sweat which is not good business but not bothered as he knows that housing is a long term investment.