Number one benefit to companies to allow WFH: they can pay me a senior level pay for staff level seniority, and I still come out ahead living in the Midwest versus moving to SF or NYC.
This is a good way to negotiate the value of your personal wfh arrangement.
But from the company R&D perspective, saving is kind of a loser argument. Cash is cheap. In pg terms we are trying to make the album that sells a million copies, not optimize the margins on nightly gigs.
Aren't there some companies that consider this (where the employee lives) when calculating their salaries?