I know several people that do that: luck into a sweet rent control deal even though you were wealthy enough to afford market rates anyway, never, ever give up the lease even after you've essentially moved away anyway and then sublet the unit out at market rates yourself.
I don't know the same people that get mad at a corporation for allegedly "cheating the system" in some way don't find this sort of thing offensive, but weirdly they don't seem to at all.