Actually they do pay for their own housing - back where they live vs work

If I send you on a business trip do you feel you should be able to expense it?
If I fly you in/out to work in some remote part of Canada do you feel I should provide room and board? (Camp)
If I relocate you for work to some remote part of Canada that has a higher cost of living than the rest of Canada, would you want some sort of offsetting allowance(s)?

Of course you would and that is perfectly reasonable