he kind of struck me as the type of Rich Prick who would make employees lift him up the steps c'mon did you see how fast his Personal assistant threw him under the bus at the sight of Raven he had to do/expect some seriously crappy things compared to a low paycheck to get that reaction
but also we're forgetting that
A. he probably had the office built when he was ambulatory
B. he owns several stories of, if not the entire Building, who's to say there are not Living Quarters which can be accessed along the 4th wall, whether on the same floor, or via an elevator where there are no steps