There's a tried and true rule that I live by. Don't get mad, get even. This being a difficult time, I feel the pain should be shared. If a landlord wanted to play hardball, I would probably disappear, trash the place or make life as difficult as I can for him/her. If a tenant wasn't able to pay, I would give him a break in the rent for a short time or allow to break lease but I would keep the deposit assuming that he/she was a good tenant of course, if not all bets are off and go back to rule #1. I do believe that in most cases you get back what you put into the world.
That said, if I was the landlord in the current market I'd much rather do a deal that will keep some income coming in than risk a prolonged vacancy and complete loss of cash flow.
SCB is freezing principal payments for mortgages for 12 months as an example.
Renters who have lost jobs or income will need to have reductions too otherwise the economic impact will be severe (think Japan and lost decades).
These are unprecedented times and one group trying to keep enriching themselves over another simply wont work, the crisis is systemic.