my employer hits my department budget with salary x 1.5 for every employee in my dept. I thought this was too high, so i went to see the controller, who showed

my employer hits my department budget with salary x 1.5 for every employee in my dept. I thought this was too high, so i went to see the controller, who showed me the numbers and indeed it is accurate--in other words, 1.5 x salary is a very good estimate for the actual hard dollar cost to the company for each employee, as a function of his/her salary. The intention was to capture all includes taxes, insurance, office space, hardware, meals, per-seat share of enterprise app licenses, etc.