I saw a show in the 90s about a young man who gets an entry level job (admin or maybe data entry) in a big corporation. He quickly climbs the corporate ladder by manipulating, backstabbing and blackmailing his colleagues.
At one point the guy drugged this one woman who was trying to expose him by putting something in her glass and accused her of being a drug addict. The woman denied the charge but to settle the matter, a drug test was ordered, which she failed and was thus fired.
At the end of the season it was suggested that the guy got the entry level position that he was initially in, by killing and impersonating the person who was actually hired for it.
Also, at one point, the camera followed the guy as he was getting back to his expensive apartment in an exclusive high rise (I want to say in NYC) to reveal that the apartment was empty and that he slept in a cardboard box set in one corner of his bedroom.