This is on top of them covering passes and encouraging employees to live closer to work, and just reflects on low quality of Bay Area's of transportation grid.

If Muni, or SAM or VTA ran buses from SOMA/Mission to corporate campuses, those would definitely be used. But after a three-hour one-way commute that involves Muni+BART+Caltrain+city bus (an example would be a Google employee in Mountain View who lives in the Mission) even a die-hard public transport fan would switch to a company bus.