If I’m going to be honest movements like that seems to be money laundering.
1 keep the staff moving
2 no one can really tell if a name in the paycheck is a real person or no(if forged right)
3 you can say you hired 300 people or something, and then fired them. Keep doing this in a cycle.(mass fire and contractvis usefull to not know who is real and who is a forgery unless under scrutiny.
4 yhe that feels like the money removing part of the operation, from the legal to the less legal channels.