I agree with this.
I don't know what conditions should be put in place, but landlords should be encouraged. Given that there isn't enough social housing due to the Tories selling it off. If housing association management of private rental was beneficial to landlords (took the management off their hands, paid a reasonable rent, ensured regular maintenance, guaranteed rent) many, many of us would snap it up. It would be safer for the tenant and the landlord. It would encourage investment. Because there will always be a section of the population who can't or don't want to buy.
6 years ago, when I moved out of my flat, I tried to contact my local council, because I'd heard there was some way I could pass it over to the management of the council (housing association I guess). I got a BIG run around, was told this wasn't feasible, they didn't offer it, my flat wasn't suitable (which was it?). They more or less told me to F Off. So I rented it via an agency who manage it. TWO years after my enquiries to the council, the SAME person who sent me away with a flea in my ear, wrote to me, offering to take the flat off my hands. As if it had been sitting empty for 2 years. Useless.