It's not exactly free money -- landlords do have to deal with the maintenance of the property, fixing/replacing broken appliances, and so forth. Before a landlord goes bankrupt they will cut back on maintenance that is not absolutely essential (something I lived through in my younger years, seeing benches fall apart, trash not being removed, and weeds taking over the front and back yards of the building), and eventually would not be able to pay for maintenance that actually is essential (good luck getting your plumbing fixed when your landlord cannot pay the plumber). There is also the matter of cascading bankruptcies when large numbers of landlords are not being paid, resulting in their loans no longer paying (likely dinging retirement accounts and pension funds).
The fact is that a major shake-up in how we organize housing e.g. getting rid of rent-seeking landlords would be difficult in normal times. Doing such a thing during a deepening economic crisis would make everything worse for everyone, including people not directly involved.