Landlords should be happy. Those who were receiving rent monies, and others receiving payments direct to them for disability and welfare recipients did NOT get their monies/cheques and had to wait until the mail was working again, hoping this would happen before rent due date was passed. Recipients however, could pick theirs up at their local offices serving them IF they had transport to do so.
Landlords are not obliged to accommodate mail strikes when their rent is due. Most would, but some would be swift with eviction notices for late/non payment of rent due on time. Mind you, it could be a good opportunity to try and turf really bad tenants

You'd think places vitally dependent on people receiving via snailmail - whatever - like survival money - pensions, disabilities, assistance, etc, would have an established alternate plan to fall back on immediately when short notice, or no notice, events come down , simply because "strikes and poop CAN and DOES happen swiftly sometimes. Its just how it is.
As to wages. I've never made sense out of how people decide what wages should be paid for what work. They're all over the place and seems to not have much to do with types of work, work experience or skills and educational training.