I got caught up on that one too. I think it could be argued that CEO is a job, and landlord is a title. Neither of those necessarily implies work.
But there might be some things that these people do which could be considered work.
So like if you were to hypothetically divorce these from
money, you could say that, I dunno: reading tech articles and going to conferences and talking about how your co-workers are implementing the tech, is work; or fixing up a house, or keeping tabs on a block of houses and making sure they're actually maintained, is work.
Maybe it is a stretch.. I do think there are "bullshit jobs" which would not exist (certainly not in the current form) without capitalism. Like there would be no demand for them outside of accruing capital for people who don't need it