All this infographic tells me is that these companies probably outsource their support jobs to other companies. That is, instead of hiring their own full-time

All this infographic tells me is that these companies probably outsource their support jobs to other companies. That is, instead of hiring their own full-time janitor to clean up at headquarters, they hire CleanCo sanitation service company, who hires the full-time janitor to clean up at headquarters. Instead of hiring a cook to work the company cafeteria, they hire CaterCo corporate catering company, who hires the cook to serve the cafeteria line. No idea what's going on with Apple. It seems implausible they could bring in that much per employee if you include all the staff at their retail stores.