I really hope the response to that is “get bent, you fucked it up”

“The number you have dialed is not connected. Please check the number, and try again.”

I hope none of them do that.

Its wild to me that you’re under no obligation to return money you are sent by accident on something like PayPal, but are for your paycheck when it’s their job to track that shit

This is pretty normal in military / federal positions. It is well known and a part of training that you are responsible for returning overpayments.