Most of the software companies I've worked for don't care about the relative salary cost because the all in cost and opportunity cost of a bad hire is way higher than the salary. For example, given the choice between a proven senior dev making 200k or a risky untrained dev making 70k they'd still just hire the senior dev. It's more about headcount with the big companies. They don't care about saving 40-60k in practice, from what I've seen.